Thank you, Rashida, for your reply. I appreciate your work (I have been your customer for years), your creativity, your commitment, your patience and your support, but I also think that all of us here must be sure that our sites can be updated, because they store sensitive data and, above all, because perhaps we work for third parties and are responsible for projects. So please tell me if I need to change template or if you will resolve the issue soon.
As for the Innovate template, it works with PHP 8.0. I installed a copy of it on a subdomain and it doesn't give me the error that comes up on the site. Can you check what happened, please, if I give you the login details for the site? Thank you very much...