Matomo for Wordpress causing cart to empty on checkout

[ssofnosaj]

Matomo for WordPress Version 4.15.2 WooCommerce Version 8.2.1 Wordpress Version 6.3.2

Had an issue where items would be added to the cart okay, but then sometimes on View Cart and always on Checkout, the cart would empty itself.

After going through the disable-all-the-plugins and reactivate-one-at-a-time process, Matomo seems to be the culprit! No idea why. But it's all working fine now with Matomo disabled.

[michalkleiner]

Thanks for reporting the issue, @ssofnosaj. I've moved it to the correct repository for the plugin. At a guess, this could be one of the compatibility issues where some other plugin interferes with the Matomo plugin.

[diosmosis]

Hi @ssofnosaj, can you provide the Matomo for Wordpress system report from the Matomo > Diagnostics page?

[ssofnosaj]

Sure can!

              # Matomo

• Matomo Plugin Version: 4.15.2
• Config exists and is writable.: Yes ("$WP_CONTENT_DIR//uploads/matomo/config/config.ini.php" )
• JS Tracker exists and is writable.: Yes ("$WP_CONTENT_DIR//uploads/matomo/matomo.js" )
• Plugin directories: Yes ([{"pluginsPathAbsolute":"\/www\/wp-content\/plugins\/matomo\/plugins","webrootDirRelativeToMatomo":"..\/"}])
• Tmp directory writable: Yes ($WP_CONTENT_DIR//cache/matomo)
• Matomo Version: 4.15.1
• Matomo Blog idSite: 1
• Matomo Install Version: 4.14.2 (Install date: 2023-07-24 16:49:45)
• Upgrades outstanding: No
• Upgrade in progress: No

Endpoints

• Matomo JavaScript Tracker URL: (http://vavoomboutique.flywheelstaging.com/wp-content/uploads/matomo/matomo.js)
• Matomo JavaScript Tracker - WP Rest API: ($site_url/wp-json/matomo/v1/hit/)
• Matomo HTTP Tracking API: ($site_url/wp-content/plugins/matomo/app/matomo.php)
• Matomo HTTP Tracking API - WP Rest API: ($site_url/wp-json/matomo/v1/hit/)

Crons

• Server time: 2023-10-23 08:00:20
• Blog time: 2023-10-23 18:00:20 (Below dates are shown in blog timezone)
• Sync users & sites: Next run: 2023-10-23 17:54:15 (-6 min 5s) ( Last started: 2023-10-23 11:40:00 (-6 hours 20 min). Last ended: 2023-10-23 11:40:00 (-6 hours 20 min). Interval: daily)
• Archive: Next run: 2023-10-23 17:54:15 (-6 min 5s) ( Last started: 2023-10-23 11:40:00 (-6 hours 20 min). Last ended: 2023-10-23 11:40:06 (-6 hours 20 min). Interval: hourly)
• Update GeoIP DB: Next run: 2023-10-23 17:54:15 (-6 min 5s) ( Last started: 2023-10-23 11:40:06 (-6 hours 20 min). Last ended: 2023-10-23 11:40:08 (-6 hours 20 min). Interval: matomo_monthly)

Mandatory checks

• PHP version >= 7.2.5: ok
• PDO extension: ok
• PDO\MYSQL extension: ok
• MYSQLI extension: ok
• Other required extensions: ok
• Required functions: ok
• Required PHP configuration (php.ini): ok
• Directories with write access: ok
• Directories with write access for Tag Manager: ok

Optional checks

• 64-bit PHP Binary: ok
• Tracker status: ok
• Memory limit: ok
• Time zone: ok
• Open URL: ok
• GD > 2.x + FreeType (graphics): ok
• Other extensions: ok
• Warning Other functions: warning (shell_exec It is recommended to turn on this PHP built-in function. Read this to learn more. set_time_limit mail parse_ini_file glob gzopen md5_file )
• Filesystem: ok
• Last Successful Archiving Completion: ok
• Database abilities: ok
• Warning Max Packet Size: warning (It is recommended to configure a 'max_allowed_packet' size in your MySQL database of at least 64MB. Configured is currently 32MB. )
• Geolocation: ok
• Update over HTTPS: ok
• Supports Async Archiving: No
• Location provider ID: geoip2php
• Location provider available: Yes
• Location provider working: Yes
• Warning Proxy header: HTTP_X_REAL_IP (A proxy header is set which means you maybe need to configure a proxy header in the Advanced settings to make location reporting work. If the location in your reports is detected correctly, you can ignore this warning. Learn more)
• Warning Proxy header: HTTP_X_FORWARDED_FOR (A proxy header is set which means you maybe need to configure a proxy header in the Advanced settings to make location reporting work. If the location in your reports is detected correctly, you can ignore this warning. Learn more)
• Had visit in last 5 days: Yes
• Matomo URL: Yes ($site_url/wp-content/plugins/matomo/app/)

Matomo Settings

• Track mode: default
• Track ecommerce: Yes
• Track codeposition: footer
• Track api endpoint: default
• Track js endpoint: default
• Version history: 4.15.2, 4.15.1, 4.15.0, 4.14.2
• Core version: 4.15.1
• Last tracking settings update: 1690181608
• Last settings update: 1690181608
• Show get started page: 0
• Track search: Yes
• Track 404: Yes

Logs

• ajax_tracker: 2023-10-21 11:38:16 (cURL error 28: Operation timed out after 5001 milliseconds with 0 bytes received => AjaxTracker.php:91; MatomoTracker.php:860; Base.php:103; Woocommerce.php:172; Woocommerce.php:99; class-wp-hook.php:308; class-wp-hook.php:334; plugin.php:517; class-wc-cart.php:1286; AbstractCartEndpoint.php:296; AbstractCartEndpoint.php:136; SimulateCartEndpoint.php:78; AbstractCartEndpoint.php:79; ButtonModule.php:133; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; class-wc-ajax.php:96; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; template-loader.php:13; wp-blog-header.php:19; index.php:17;)
• ajax_tracker: 2023-10-21 15:25:27 (cURL error 28: Operation timed out after 5003 milliseconds with 0 bytes received => AjaxTracker.php:91; MatomoTracker.php:860; Base.php:103; Woocommerce.php:172; Woocommerce.php:99; class-wp-hook.php:308; class-wp-hook.php:334; plugin.php:517; class-wc-cart.php:1286; AbstractCartEndpoint.php:296; AbstractCartEndpoint.php:136; SimulateCartEndpoint.php:78; AbstractCartEndpoint.php:79; ButtonModule.php:133; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; class-wc-ajax.php:96; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; template-loader.php:13; wp-blog-header.php:19; index.php:17;)
• ajax_tracker: 2023-10-21 15:25:32 (cURL error 28: Operation timed out after 5001 milliseconds with 0 bytes received => AjaxTracker.php:91; MatomoTracker.php:860; Base.php:103; Woocommerce.php:172; Woocommerce.php:99; class-wp-hook.php:308; class-wp-hook.php:334; plugin.php:517; class-wc-cart.php:1315; AbstractCartEndpoint.php:348; SimulateCartEndpoint.php:159; SimulateCartEndpoint.php:83; AbstractCartEndpoint.php:79; ButtonModule.php:133; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; class-wc-ajax.php:96; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; template-loader.php:13; wp-blog-header.php:19; index.php:17;)
• ajax_tracker: 2023-10-21 15:42:40 (cURL error 28: Operation timed out after 5001 milliseconds with 0 bytes received => AjaxTracker.php:91; MatomoTracker.php:860; Base.php:103; Woocommerce.php:172; Woocommerce.php:99; class-wp-hook.php:308; class-wp-hook.php:334; plugin.php:517; class-wc-cart.php:1286; AbstractCartEndpoint.php:296; AbstractCartEndpoint.php:136; SimulateCartEndpoint.php:78; AbstractCartEndpoint.php:79; ButtonModule.php:133; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; class-wc-ajax.php:96; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; template-loader.php:13; wp-blog-header.php:19; index.php:17;)
• ajax_tracker: 2023-10-23 10:05:17 (cURL error 28: Operation timed out after 5000 milliseconds with 0 bytes received => AjaxTracker.php:91; MatomoTracker.php:860; Base.php:103; Woocommerce.php:172; Woocommerce.php:99; class-wp-hook.php:308; class-wp-hook.php:334; plugin.php:517; class-wc-cart.php:1315; AbstractCartEndpoint.php:348; SimulateCartEndpoint.php:159; SimulateCartEndpoint.php:83; AbstractCartEndpoint.php:79; ButtonModule.php:133; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; class-wc-ajax.php:96; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; template-loader.php:13; wp-blog-header.php:19; index.php:17;)
• ajax_tracker: 2023-10-23 10:05:27 (cURL error 28: Operation timed out after 5001 milliseconds with 0 bytes received => AjaxTracker.php:91; MatomoTracker.php:860; Base.php:103; Woocommerce.php:172; Woocommerce.php:99; class-wp-hook.php:308; class-wp-hook.php:334; plugin.php:517; class-wc-cart.php:1286; AbstractCartEndpoint.php:296; AbstractCartEndpoint.php:136; SimulateCartEndpoint.php:78; AbstractCartEndpoint.php:79; ButtonModule.php:133; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; class-wc-ajax.php:96; class-wp-hook.php:310; class-wp-hook.php:334; plugin.php:517; template-loader.php:13; wp-blog-header.php:19; index.php:17;)

WordPress

• Home URL: $site_url
• Site URL: $site_url
• WordPress Version: 6.3.2
• Number of blogs: 1
• Multisite Enabled: No
• Network Enabled: No
• WP_DEBUG: No
• WP_DEBUG_DISPLAY: Yes
• WP_DEBUG_LOG: No
• DISABLE_WP_CRON: -
• FORCE_SSL_ADMIN: No
• WP_CACHE: No
• CONCATENATE_SCRIPTS: -
• COMPRESS_SCRIPTS: -
• COMPRESS_CSS: -
• ENFORCE_GZIP: -
• WP_LOCAL_DEV: -
• WP_CONTENT_URL: http://vavoomboutique.flywheelstaging.com/wp-content
• WP_CONTENT_DIR: $WP_CONTENT_DIR/
• UPLOADS: -
• BLOGUPLOADDIR: -
• DIEONDBERROR: -
• WPLANG:
• ALTERNATE_WP_CRON: -
• WP_CRON_LOCK_TIMEOUT: 60
• WP_DISABLE_FATAL_ERROR_HANDLER: -
• MATOMO_SUPPORT_ASYNC_ARCHIVING: -
• MATOMO_TRIGGER_BROWSER_ARCHIVING: -
• MATOMO_ENABLE_TAG_MANAGER: -
• MATOMO_SUPPRESS_DB_ERRORS: -
• MATOMO_ENABLE_AUTO_UPGRADE: -
• MATOMO_DEBUG: -
• MATOMO_SAFE_MODE: -
• MATOMO_GLOBAL_UPLOAD_DIR: -
• MATOMO_LOGIN_REDIRECT: -
• Permalink Structure: /%postname%/
• Possibly uses symlink: No
• Upload base url: http://vavoomboutique.flywheelstaging.com/wp-content/uploads
• Upload base dir: $WP_CONTENT_DIR//uploads
• Upload url: http://vavoomboutique.flywheelstaging.com/wp-content/uploads/2023/10
• Custom upload_path:
• Custom upload_url_path:
• Compatible content directory: Yes

WordPress Plugins

• Advanced WordPress Backgrounds: 1.11.4
• Afterpay Gateway for WooCommerce: 3.6.1
• Astra Bulk Edit: 1.2.8
• Astra Pro: 4.3.3
• Astra Widgets: 1.2.12
• Block Navigation: 4.1.1
• Code Snippets: 3.5.0
• Contact Form 7: 5.8.1
• Convert Pro: 1.7.7
• Convert Pro - Addon: 1.5.6
• Facebook for WooCommerce: 3.1.2
• Google Listings and Ads: 2.5.10
• Gravity Forms: 2.7.15
• Import / Export Customizer Settings: 1.0.7
• Jetpack: 12.7
• Matomo Analytics - Ethical Stats. Powerful Insights.: 4.15.2
• Media Hygiene: 1.0.5
• Media Hygiene Pro: 1.1
• Pixel Manager for WooCommerce: 1.34.0
• Pixel Manager for WooCommerce: 1.34.0
• PixelYourSite: 9.4.7
• Product Feed PRO for WooCommerce: 13.0.6
• Security Optimizer - The All-In-One WordPress Protection Plugin: 1.4.6
• SEOPress: 7.0.3
• SEOPress PRO: 7.0.2
• Simple Image Sizes: 3.2.2
• Simple Lightbox: 2.9.3
• Spectra: 2.8.0
• Spectra Pro: 1.0.4
• UpdraftPlus - Backup/Restore: 2.23.10.26
• Video User Manuals: 2.5.13
• WooCommerce: 8.2.1
• WooCommerce Admin: 3.3.2
• WooCommerce Afterpay Gateway: 1.3.1
• WooCommerce Blocks: 11.3.1
• WooCommerce Google Analytics Integration: 1.8.7
• WooCommerce PayPal Payments: 2.3.1
• WooCommerce Smart Coupons: 8.6.0
• WP-Optimize Premium - Clean, Compress, Cache: 3.2.20
• WP All Import - WooCommerce Import Add-On Pro: 4.0.0
• WP All Import - WooCommerce Import Add-On Pro: 4.0.0
• WP All Import Pro: 4.7.8
• WPCode Lite: 2.1.3.1
• WP Mail SMTP: 3.9.0
• Active Plugins: 26 (gravityforms:2.7.15 afterpay-gateway-for-woocommerce:3.6.1 astra-addon:4.3.3 astra-widgets:1.2.12 code-snippets:3.5.0 facebook-for-woocommerce:3.1.2 google-listings-and-ads:2.5.10 insert-headers-and-footers:2.1.3.1 jetpack:12.7 matomo:4.15.2 pixelyoursite:9.4.7 simple-image-sizes:3.2.2 simple-lightbox:2.9.3 ultimate-addons-for-gutenberg:2.8.0 updraftplus:2.23.10.26 video-user-manuals:2.5.13 woo-product-feed-pro:13.0.6 woocommerce-google-adwords-conversion-tracking-tag:1.34.0 woocommerce-google-analytics-integration:1.8.7 woocommerce-paypal-payments:2.3.1 woocommerce-smart-coupons:8.6.0 woocommerce:8.2.1 wp-all-import-pro:4.7.8 wp-seopress-pro:7.0.2 wp-seopress:7.0.3 wpai-woocommerce-add-on:4.0.0)
• Warning Not compatible plugins: 1 (google-listings-and-ads Matomo may work fine when using these plugins but there may be some issues. For more information See this FAQ)
• Theme: astra (astra-child)

Server

• Server Info: Flywheel/5.1.0
• PHP OS: Linux
• PHP Version: 7.4.33.4
• PHP SAPI: fpm-fcgi
• PHP Binary Name: /usr/sbin/php-fpm7.4-zend
• PHP Maxmind DB extension: Not loaded
• PHP Error Reporting: 0 After bootstrap: 0
• Timezone: UTC
• WP timezone: Australia/Brisbane
• Locale: en_US
• User Locale: en_US
• Memory Limit: 256M (At least 128MB recommended. Depending on your traffic 256MB or more may be needed.)
• WP Memory Limit: 256M
• WP Max Memory Limit: 256M
• Timezone version: 2023.3
• Time: 1698048020
• Max Execution Time: 180
• Max Post Size: 300M
• Max Upload Size: 314572800
• Max Input Vars: 10000
• Disabled PHP functions: Yes (disk_free_space,diskfreespace,dl,exec,fpassthru,getmypid,getmyuid,highlight_file,link,opcache_compile_file,opcache_get_configuration,opcache_is_script_cached,passthru,pcntl_alarm,pcntl_exec,pcntl_fork,pcntl_get_last_error,pcntl_getpriority,pcntl_setpriority,pcntl_signal,pcntl_signal_dispatch,pcntl_sigprocmask,pcntl_sigtimedwait,pcntl_sigwaitinfo,pcntl_strerror,pcntl_wait,pcntl_waitpid,pcntl_wexitstatus,pcntl_wifcontinued,pcntl_wifexited,pcntl_wifsignaled,pcntl_wifstopped,pcntl_wstopsig,pcntl_wtermsig,phpinfo,popen,posix_ctermid,posix_getcwd,posix_getegid,posix_geteuid,posix_getgid,posix_getgrgid,posix_getgrnam,posix_getgroups,posix_getlogin,posix_getpgid,posix_getpgrp,posix_getpid,posix_getppid,posix_getpwnam,posix_getpwuid,posix_getrlimit,posix_getsid,posix_getuid,posix_isatty,posix_kill,posix_mkfifo,posix_setegid,posix_seteuid,posix_setgid,posix_setpgid,posix_setsid,posix_setuid,posix_times,posix_ttyname,posix_uname,proc_close,proc_get_status,proc_nice,proc_open,proc_terminate,shell_exec,show_source,socket_listen,source,system,virtual)
• zlib.output_compression is off: Yes
• Curl Version: 7.68.0, OpenSSL/1.1.1f
• Suhosin installed: No

Database

• MySQL Version: 5.7.43
• Mysqli Connect: Yes
• Force MySQL over Mysqli: No
• DB Prefix: wpqxf9e2wzr6
• DB CHARSET: utf8
• DB COLLATE:
• SHOW ERRORS: No
• SUPPRESS ERRORS: No
• Uses Socket: No
• Uses IPv6: No
• Matomo tables found: 119
• DB tables exist: Yes
• Matomo users found: 7
• Matomo sites found: 1
• Required permissions: OK

Browser

• Browser: (Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36)
• Language: en-au,en,en-gb,en-us

[diosmosis]

@ssofnosaj can you try the following with Matomo enabled:

• Add the following to your wp-config.php file (make sure to add it before the line that tells you to stop editing):

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);

• Trigger the issue with the cart emptying.

• Find the debug.log file (which should be in the same folder as the wp-config.php file) and email it to me at dizzy@innocraft.com. (Afterwards you can remove the changes to wp-config.php and the debug.log file.)