Okay, the second error log above is BS because it occurred before I got upgraded to the new paypal so ignore that.
In regards to the first error log above ChatGPT, I know hiss, hiss, boo, boo but it helps me a lot sometimes, indicates that this is a PHP method signature mismatch between the PayPal RESTful module and Zen Cart’s messageStack class:

paypalr is declaring:

Code:
public function output(?string $class = null)

Zen Cart’s messageStack::output() is declared as:

Code:
public function output($class)
In PHP 8+, method signatures in subclasses must match exactly (including nullable types and default values).

Proposed fix:
Open:

/includes/modules/payment/paypal/PayPalRestful/Admin/Formatters/Messages.php


Find:

Code:
public function output(?string $class = null)

Replace with:

Code:
public function output($class = null)

That makes the signature compatible with messageStack::output($class).

If the above is correct then I will just make the change.
If not then I apologize and please advise.
Thank You for any assistance with this issue.