Try Version 4.16.1 Before Release

[CS-Cart_team]

Please check my other post:

Php 8.0 And 8.1 Support

Thanks for the reply. PHP Warning: math: illegal characters This one error is most possibly related to third party theme used in your store. I am unable to reproduce it. The following error entry: PHP Deprecated: Required parameter I am confirming this. In order to fix it in your installation, please apply the attached .diff file. 0d9ce078cbc0c2444437dd4bf2803251693af144.diff (997 Bytes) I have notified the developers regarding this issue.