PHP Warnings

Can you please let me know what these PHP errors mean? Maybe they are contributing to me not getting the correct payment status

[12-Dec-2023 01:47:47 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 01:49:26 UTC] PHP Warning:  Undefined variable $prices in /home/chargril/public_html/wp-content/plugins/restropress/includes/rp-ajax-functions.php on line 302

[12-Dec-2023 01:49:26 UTC] PHP Warning:  Undefined variable $prices in /home/chargril/public_html/wp-content/plugins/restropress/includes/rp-ajax-functions.php on line 302

[12-Dec-2023 01:49:26 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 07:50:13 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 07:50:13 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 07:54:45 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 07:54:45 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 07:59:13 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 07:59:13 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 08:10:21 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 08:10:21 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

[12-Dec-2023 08:13:41 UTC] PHP Warning:  Undefined variable $color in /home/chargril/public_html/wp-content/plugins/restropress/templates/rpress-show-products.php on line 6

The page I need help with: [log in to see the link]