Issues PHP 8+, Joomla 4 and Virtuemart 4

EIF

I have updated my webshop to Joomla 4 and Virtuemart 4, so I also update the Storefront template to version 4.1.
But there a lot of errors, for example:

`Deprecated: stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in C:\xampp\htdocs\updatetest\templates\gk_storefront\html\mod_custom\default.php on line 20

Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\updatetest\templates\gk_storefront\html\layouts\chromes\gk_style.php on line 25

Deprecated: stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in C:\xampp\htdocs\updatetest\templates\gk_storefront\html\layouts\chromes\gk_style.php on line 94

Deprecated: stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in C:\xampp\htdocs\updatetest\templates\gk_storefront\html\layouts\chromes\gk_style.php on line 120`

What is causing this errors and how can I fix this?

saguaros

EIF Hi

It seems due to the PHP version you're using, could you put your site online and share the login credentials of your site eg: URL + super admin + ftp account so I can check for you?

Regards