Default permitted_uri_chars msg not showing up, instead showing exception error msg

@gomesh
Thanks for the reply.No, I haven't tried with a clean version of CI, because the current website is quite a big one and replicating each and every functionality in the new one would be quite a task. As a last resort, i may try this one.

I upload the complete CodeIgniter folder from my localhost to Online and have a ci4-app-test.php which calls the original CodeIgniter4/app.

File: ci4-app-test.php
require '/var/www/CodeIgniter4/public/index.php';

BEWARE:
The writable folder must be writable which it is not by default.