Hi,
Thanks for the quick response. I got the server admin to remove the PSR extension which has solved that error. However, I am now getting a 500 Internal Server Error message.
Code:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
Nothing in server error log or CI log folder to help me track down the issue.
Tried a fresh Composer App Starter install and same issue. I have instances of CI 4.4.8 running on the same server without any issues so I assume there is some other incompatibility with the server environment with 3.5.1
However, without any error messages its difficult to know where to start.