Can't access "Configuration" page on "live" site but I can on "test" site with same exact server configurations?

Your software
My Mautic version is: v2.16.3
My PHP version is: 7.3.33
My Database type and version is: MariaDB 10.1.48

Your problem
My problem is: I have 2 installations of Mautic installed on sub-domains “” and “”. They’re both under PHP 7.3.33 wiwth MariaDB 10.1.48.

At first I wasn’t able to access the “Configuration” page on the test site until I changed PHP to 7.3.33, but then I did that with the live site and it doesn’t seem to work for the live site.

Can someone please help me resolve this issue? What steps can I take to try to figure out what is causing this not to work on the live site?

Thank you.

These errors are showing in the log:

Steps I have tried to fix the problem:

I was able to fix this by taking the “/mautic_path/app/config/local.php” file from my test Mautic site and modifying it by changing the paths to point to my live Mautic site.

Then I uploaded this file to my live Mautic site and I was able to finally get the “Configuration” page to load on my live Mautic site.