500 Internal Server Error

[CarteBlanch]

I keep getting the following error message when i click on any secondary page, products, categories  and sub-categories.

Any idea why This my site keeps displaying this message and how can i fix it?

 

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at [email protected] 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.

[musicmaster]

Did you enable development mode?

https://www.prestashop.com/forums/topic/224525-how-to-turn-on-error-reporting-for-debug-information-blank-page-500-internal-server-error/