I am currently running Zen Cart version 1.5.5e. My hosting provider is forcing an upgrade from pHp 7.4 to 8.0 (or 8.1) as from next week Monday. My developer has been working many hours in order to try and solve the VERY LARGE AMOUNT of compatibility issues. However, a lot of 'error 500' problems and 'too many redirects' errors still persist.

I am worried that we are running out of time...

Is there anyone that can confirm that upgrading to the latest version of Zen cart might help?

I believe support for pHp 7.4 ends 28 Nov 2022.