Website Critical Error when PHP Update

I apologize for having to use this channel, but while I am the current developer of the website, I did not originally build it and so I do not have access to our purchase code to create an account and correspond “correctly”. I am having an issue where /something/ that I cannot track down in the enfold theme is causing a critical error on my website when trying to update the PHP past 7.4. The theme is updated, my envato token is active, etc. I have traced the issue to the theme as I can update the website to PHP 8.1 when I switch to another theme, but I want to continue using the Enfold theme and so am trying to make this work. If phone communication is easier, my cell is (843)303-4733. Thank you!