Elementor Pro - Fatal Uncaught TypeError caused by empty settings in Loop Grid widget

Prerequisites

[X] I have searched for similar issues in open and closed tickets and cannot find a duplicate.
[X] I have troubleshooted my issue, and it still exists against the latest stable version of Elementor.

Description

If in the loop-grid widget the "Items Per Page" or "Columns" settings are set to no value it will lead to a fatal Uncaught TypeError in /elementor-pro/modules/woocommerce/module.php at line 1601 inside the adjust_setting_for_product_renderer() function. This is because the ceil() function will be called with a string parameter instead of numeric.

ewf432

rtr45g

Possible solutions:

The settings should not be allowed to be left to empty value (i.e. required settings).
Switch the isset() to ! empty() since probably the 0 numeric value wouldn't make any difference to the rows calculation.
The empty string value should get a numeric representation if it's somehow meaningful to the rows calculation.
The if statement at line 1600 should check for empty string before trying to calculate the rows setting.

Here's the stack trace:

Fatal error: Uncaught TypeError: Unsupported operand types: int / string in /var/www/wp-site/wp-content/plugins/elementor-pro/modules/woocommerce/module.php:1601 Stack trace: #0 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/woocommerce/module.php(1563): ElementorPro\Modules\Woocommerce\Module->adjust_setting_for_product_renderer() #1 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/woocommerce/module.php(1553): ElementorPro\Modules\Woocommerce\Module->parse_loop_query_args() #2 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/woocommerce/module.php(1504): ElementorPro\Modules\Woocommerce\Module->loop_query() #3 /var/www/wp-site/wp-includes/class-wp-hook.php(324): ElementorPro\Modules\Woocommerce\Module->ElementorPro\Modules\Woocommerce\{closure}() #4 /var/www/wp-site/wp-includes/plugin.php(205): WP_Hook->apply_filters() #5 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/query-control/classes/elementor-post-query.php(154): apply_filters() #6 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/query-control/classes/elementor-post-query.php(49): ElementorPro\Modules\QueryControl\Classes\Elementor_Post_Query->get_query_args() #7 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/query-control/module.php(962): ElementorPro\Modules\QueryControl\Classes\Elementor_Post_Query->get_query() #8 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/posts/widgets/posts.php(73): ElementorPro\Modules\QueryControl\Module->get_query() #9 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/loop-builder/widgets/base.php(57): ElementorPro\Modules\Posts\Widgets\Posts->query_posts() #10 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/posts/skins/skin-base.php(908): ElementorPro\Modules\LoopBuilder\Widgets\Base->query_posts() #11 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/loop-builder/skins/skin-loop-base.php(123): ElementorPro\Modules\Posts\Skins\Skin_Base->render() #12 /var/www/wp-site/wp-content/plugins/elementor-pro/modules/woocommerce/skins/skin-loop-product.php(36): ElementorPro\Modules\LoopBuilder\Skins\Skin_Loop_Base->render() #13 /var/www/wp-site/wp-content/plugins/elementor/includes/base/skin-base.php(79): ElementorPro\Modules\WooCommerce\Skins\Skin_Loop_Product->render() #14 /var/www/wp-site/wp-content/plugins/elementor/includes/base/widget-base.php(632): Elementor\Skin_Base->render_by_mode() #15 /var/www/wp-site/wp-content/plugins/elementor/includes/base/widget-base.php(758): Elementor\Widget_Base->render_content() #16 /var/www/wp-site/wp-content/plugins/elementor/includes/base/element-base.php(551): Elementor\Widget_Base->get_raw_data() #17 /var/www/wp-site/wp-content/plugins/elementor/includes/base/element-base.php(551): Elementor\Element_Base->get_raw_data() #18 /var/www/wp-site/wp-content/plugins/elementor/core/base/document.php(1067): Elementor\Element_Base->get_raw_data() #19 /var/www/wp-site/wp-content/plugins/elementor/core/base/document.php(723): Elementor\Core\Base\Document->get_elements_raw_data() #20 /var/www/wp-site/wp-content/plugins/elementor/includes/base/controls-stack.php(1060): Elementor\Core\Base\Document->get_initial_config() #21 /var/www/wp-site/wp-content/plugins/elementor/core/editor/loader/common/editor-common-scripts-settings.php(37): Elementor\Controls_Stack->get_config() #22 /var/www/wp-site/wp-content/plugins/elementor/core/editor/loader/v1/editor-v1-loader.php(76): Elementor\Core\Editor\Loader\Common\Editor_Common_Scripts_Settings::get() #23 /var/www/wp-site/wp-content/plugins/elementor/core/editor/editor.php(358): Elementor\Core\Editor\Loader\V1\Editor_V1_Loader->enqueue_scripts() #24 /var/www/wp-site/wp-includes/class-wp-hook.php(324): Elementor\Core\Editor\Editor->enqueue_scripts() #25 /var/www/wp-site/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #26 /var/www/wp-site/wp-includes/plugin.php(517): WP_Hook->do_action() #27 /var/www/wp-site/wp-includes/script-loader.php(2265): do_action() #28 /var/www/wp-site/wp-includes/class-wp-hook.php(324): wp_enqueue_scripts() #29 /var/www/wp-site/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #30 /var/www/wp-site/wp-includes/plugin.php(517): WP_Hook->do_action() #31 /var/www/wp-site/wp-includes/general-template.php(3050): do_action() #32 /var/www/wp-site/wp-content/plugins/elementor/includes/editor-templates/editor-wrapper.php(31): wp_head() #33 /var/www/wp-site/wp-content/plugins/elementor/core/editor/loader/v1/editor-v1-loader.php(110): include('...') #34 /var/www/wp-site/wp-content/plugins/elementor/core/editor/editor.php(163): Elementor\Core\Editor\Loader\V1\Editor_V1_Loader->print_root_template() #35 /var/www/wp-site/wp-includes/class-wp-hook.php(324): Elementor\Core\Editor\Editor->init() #36 /var/www/wp-site/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #37 /var/www/wp-site/wp-includes/plugin.php(517): WP_Hook->do_action() #38 /var/www/wp-site/wp-admin/admin.php(419): do_action() #39 /var/www/wp-site/wp-admin/post.php(12): require_once('...') #40 {main} thrown in /var/www/wp-site/wp-content/plugins/elementor-pro/modules/woocommerce/module.php on line 1601

Steps to reproduce

Create a products template
Add a loop-grid widget and use the products template
Leave "Items per Page" or "Columns" setting empty
Save and reload the editor page
You should see the fatal.

Expected behavior

Expected behavior is for the code to not produce fatal errors and break people's sites.

Isolating the problem

[X] This bug happens when only the Elementor (and Elementor Pro) plugins are active.
[X] This bug happens with the Hello Elementor theme active.
[X] I can reproduce this bug consistently by following the steps I described above.

Elementor System Info

== Server Environment ==
    Operating System: Linux
    Software: Apache/2.4.59 (Ubuntu)
    MySQL version: (Ubuntu) v8.0.36
    PHP Version: 8.1.28
    PHP Memory Limit: 512M
    PHP Max Input Vars: 1000
    PHP Max Post Size: 8M
    GD Installed: No
    ZIP Installed: Yes
    Write Permissions: All right
    Elementor Library: Connected

== WordPress Environment ==
    Version: 6.5.2
    Site URL: http://test.demo.localhost
    Home URL: http://test.demo.localhost
    WP Multisite: No
    Max Upload Size: 2 MB
    Memory limit: 40M
    Max Memory limit: 512M
    Permalink Structure: /%year%/%monthnum%/%day%/%postname%/
    Language: en_US
    Timezone: 0
    Admin Email: test@test.com
    Debug Mode: Active

== Theme ==
    Name: Hello Elementor
    Version: 3.0.1
    Author: Elementor Team
    Child Theme: No

== User ==
    Role: administrator
    WP Profile lang: en-US
    User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Edg/124.0.0.0

== Active Plugins ==
    Elementor
        Version: 3.21.4
        Author: Elementor.com

    Elementor Pro
        Version: 3.21.2
        Author: Elementor.com

    WooCommerce
        Version: 8.8.3
        Author: Automattic

== Elements Usage ==

    header : 1
        button : 6
        call-to-action : 3
        container : 62
        fibosearch : 1
        heading : 7
        icon : 3
        icon-list : 1
        image : 10
        image-box : 1
        mega-menu : 2
        nav-menu : 7
        theme-site-logo : 2
        wc-categories : 4
        woocommerce-menu-cart : 2
    footer : 1
        button : 2
        container : 17
        divider : 1
        form : 1
        heading : 5
        nav-menu : 3
        social-icons : 1
        text-editor : 4
        theme-site-logo : 1
    page : 1
        button : 3
        container : 2
        heading : 1
        spacer : 1
        text-editor : 1
    popup : 3
        button : 6
        container : 8
        fibosearch : 1
        form : 1
        icon : 2
        login : 1
        spacer : 1
        text-editor : 2
        wc-categories : 1
    product : 1
        button : 4
        container : 10
        divider : 2
        heading : 5
        icon : 1
        loop-carousel : 3
        shortcode : 1
        spacer : 1
        text-editor : 1
        toggle : 1
        woocommerce-breadcrumb : 1
        woocommerce-notices : 1
        woocommerce-product-add-to-cart : 1
        woocommerce-product-additional-information : 1
        woocommerce-product-images : 1
        woocommerce-product-price : 1
        woocommerce-product-title : 1
    widget : 0
        spacer : 1
    wp-page : 29
        button : 29
        container : 162
        divider : 23
        form : 1
        heading : 65
        hotspot : 4
        icon : 14
        icon-box : 10
        icon-list : 1
        image : 19
        loop-carousel : 2
        loop-grid : 8
        sbi-widget : 1
        shortcode : 21
        slides : 1
        spacer : 4
        text-editor : 59
        theme-post-featured-image : 2
        wc-categories : 2
        wc-elements : 1
        woocommerce-cart : 1
        woocommerce-checkout-page : 1
        woocommerce-my-account : 1
        woocommerce-notices : 1
        woocommerce-product-price : 2
        woocommerce-purchase-summary : 1
        wp-widget-berocket_aapf_group : 6
    single-page : 3
        container : 9
        heading : 2
        spacer : 3
        theme-post-content : 3
        theme-post-title : 1
        woocommerce-breadcrumb : 2
    product-post : 0
        container : 7
        text-editor : 7
    product-archive : 1
        container : 5
        loop-grid : 1
        shortcode : 2
        spacer : 1
        theme-archive-title : 1
        woocommerce-breadcrumb : 1
        wp-widget-berocket_aapf_group : 1
    loop-item : 5
        container : 18
        heading : 8
        shortcode : 7
        theme-post-content : 1
        theme-post-featured-image : 4
        woocommerce-product-price : 3

== Settings ==

    cpt_support: post, page, product
    allow_tracking: yes
    unfiltered_files_upload: 1
    font_display: swap

== Features ==
    Custom Fonts: 0
    Custom Icons: 0

== Integrations ==

    woocommerce: Active

== Elementor Experiments ==
    Improved Asset Loading: Active by default
    Improved CSS Loading: Active
    Inline Font Icons: Active
    Additional Custom Breakpoints: Active
    admin_menu_rearrangement: Inactive by default
    Flexbox Container: Active
    Upgrade Swiper Library: Active
    Grid Container: Inactive
    Nested Elements Performance: Inactive by default
    Optimized Control Loading: Inactive
    Default to New Theme Builder: Active by default
    Hello Theme Header & Footer: Active by default
    Elementor Home Screen: Active by default
    Editor Top Bar: Inactive
    Build with AI: Inactive
    Landing Pages: Inactive
    Nested Elements: Active
    Lazy Load Background Images: Inactive
    Display Conditions: Inactive
    Form Submissions: Active by default
    Menu: Active
    Taxonomy Filter: Inactive

== Log ==

== Elementor - Compatibility Tag ==

    Elementor Pro: Compatible

== Elementor Pro - Compatibility Tag ==

Agreement

[X] I agree that my issue may be closed without action if it doesn't meet all the requirements.

elementor / elementor

Elementor Pro - Fatal Uncaught TypeError caused by empty settings in Loop Grid widget #27212