Domain in Plesk shows 500 internal server error: Invalid command, perhaps misspelled or defined by a module not included in the server configuration

Updated April 05, 2023 03:54

Plesk for Linux kb: technical

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A website in Plesk does not work with the following error:

500 internal server error
Errors similar to the following can be found in the domain's error log at Domains > example.com > Logs:

[Wed Aug 16 00:40:46.215457 2017] [core:alert] [pid 5307:tid 140079947310848] [client 203.0.113.2:44785] /var/www/vhosts/example.com/httpdocs/.htaccess: Invalid command 'php_value', perhaps misspelled or defined by a module not included in the server configuration

Note: directive php_value in the error message may differ. The solution will use php_value as an example.

Website's .htaccess file contains a directive that is not supported or is incorrect.

Log into Plesk
Navigate to Domains > example.com > File Manager, open .htaccess file and comment out the lines beginning with php_value by prepending a # character

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