phpMyAdmin inaccessible with 500 error (PHP Fatal error: Exception thrown without a stack frame in Unknown)

Symptoms

A user is unable to access phpMyAdmin as it returns a 500 Internal Server Error or ParseError without any other noticeable errors being presented.

Check to see if the following log file exists for the user:

CONFIG_TEXT: /home/$username/logs/.php.error.log

Note: Replace $username with the cPanel username in question.

Example error messages that may be seen:

CONFIG_TEXT: [20-Jan-2025 17:57:27 Europe/London] PHP Parse error:  syntax error, unexpected end of 
file in /home/username/tmp/pma_template_compiles_eposany1/
twig/99/9937763182924ca59c5731a9e6a0d96c77ec0ca5ce3241eec146f7bca0a6a0dc.php on line 135
[20-Jan-2025 17:57:27 Europe/London] PHP Fatal error:  Exception thrown without a stack
 frame in Unknown on line 0

Cause 

The issue could be related to problems with the locally compiled phpMyAdmin template files.

Resolution

Move aside the phpMyAdmin compiled template files for the user:

Note: Replace $username with the cPanel username in question.

# mkdir -vp /home/$username/pma-tmp/

# mv -v /home/$username/tmp/pma_template_compiles_$username/ /home/$username/pma-tmp/