Product listings causing Error log

[Carbonless]

Not really sure whats causing the error logs. I can't seem to reproduce them.
The site madrigalscripts.com is giving this error at times:

[17-Jan-2021 08:43:02 America/Chicago] Request URI: /index.php?main_page=featured_products, IP address: XXXXX
#1  include(/includes/modules/madrigal/product_listing.php) called at  [/includes/templates/madrigal/templates/tpl_modules_product_listing.php:12]
#2   require(/includes/templates/madrigal/templates/tpl_modules_product_listing.php)  called at  [/includes/templates/madrigal/templates/tpl_featured_products_default.php:26]
#3   require(/includes/templates/madrigal/templates/tpl_featured_products_default.php)  called at [/includes/templates/madrigal/common/tpl_main_page.php:195]
#4  require(/includes/templates/madrigal/common/tpl_main_page.php) called at [/index.php:94]
--> PHP Warning: Use of undefined constant TEXT_NO_PRODUCTS - assumed  'TEXT_NO_PRODUCTS' (this will throw an Error in a future version of  PHP) in /includes/modules/madrigal/product_listing.php on line 265.

[DrByte]

undefined constant TEXT_NO_PRODUCTS

That means that a language file defining the meaning of TEXT_NO_PRODUCTS hasn't been found or loaded.

[Carbonless]

That means that a language file defining the meaning of TEXT_NO_PRODUCTS hasn't been found or loaded.

Thanks Doc... probably makes total sense to you. My rusty brain is kinda like the robot enclosed brain from the Doom Patrol.

[DrByte]

The first line of the log says what page it's happening on:
"Request URI: /index.php?main_page=featured_products"

Thus one expects that its language defines are in the featured_products.php language file, or in english.php or in one of the language files that load on every page such as extra_definitions/*.php and a few others like button_names etc.

Given that you're using a beta version of product_listing.php (which is called by featured_products), there may be a bug.
In the meantime you can copy this line from index.php language file to featured_products.php language file:

define('TEXT_NO_PRODUCTS', 'There are no products to list in this category.');

[Carbonless]

define('TEXT_NO_PRODUCTS', 'There are no products to list in this category.');

Added and resolved.