Fatal error on home page after installing the plugin

[ilearnio]

Describe the bug

I'm getting a fatal error on home page after installing this plugin. This is because I'm displaying product via shortcode on home page.

I am going to prepare a PR regarding this issue.

Copy of this issue on WP https://wordpress.org/support/topic/fatal-error-on-home-page-after-successfull-payment/

2021/08/30 20:36:09 [error] 2677#0: *22739 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Uncaught Error: Call to a member function get_price() on bool in /var/www/site.com/public/wp-content/plugins/woocommerce/includes/wc-product-functions.php:963
Stack trace:
#0 /var/www/site.com/public/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-cart-handler.php(533): wc_get_price_including_tax()
#1 /var/www/site.com/public/wp-includes/class-wp-hook.php(303): WC_Gateway_PPEC_Cart_Handler->inject_credit_messaging_configuration()
#2 /var/www/site.com/public/wp-includes/plugin.php(189): WP_Hook->apply_filters()
#3 /var/www/site.com/public/wp-content/plugins/woocommerce-gateway-paypal-express-checkout/includes/class-wc-gateway-ppec-cart-handler.php(610): apply_filters()
#4 /var/www/site.com/public/wp-includes/class-wp-hook.php(303): WC_Gateway_PPEC_Cart_Handler->enqueue_scripts()
#5 /var/www/site.com/public/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
#6 /var/www/site.com/publ" while reading response header from upstream, client: 176.120.105.249, server: site.com, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9050", host: "site.com"
2021/08/30 21:15:16 [error] 2674#0: *23148 FastCGI sent in stderr: "Unable to open primary script: /var/www/site.com/public/cli/garbagecron.php (No such file or directory)" while reading response header from upstream, client: 185.191.34.215, server: site.com, request: "POST /cli/garbagecron.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9050", host: "site.com"

To reproduce

1. Add a product to home page with a shortcode [product_page id="ID"]
2. Navigate to home page

Expected behavior

Environment (please complete the following information):

• WordPress Version: 5.8
• WooCommerce Version: 5.3.0
• PayPal (Express) Checkout Plugin Version: 2.1.2
• Browser [e.g. chrome, safari] and Version: Chrome
• Any other plugins installed

Additional details

System status

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