[Note: remember to include site URL, ZC version, list of plugins, PHP version, etc ... read the Posting Tips shown above for information to include in your post here.
And, remove this comment before actually posting!]

Sorry I accidentally posted this problem in the upgrading to 1.58 section of an existing thread. I was not able to delete it and post the problem here.

So as not to double post I am posting here that explains the problem. The issue is with "Use of undefined constant MODULE_PAYMENT_PAYPALDP_DEBUGGING - assumed 'MODULE_PAYMENT_PAYPALDP_DEBUGGING".

It's a fresh install 1.58
Php 7.4
Bootstrap clone Template

https://www.zen-cart.com/showthread....45#post1392645