problème paypal

[fetedeskdos]

bonjour, mon module paypal ne fonctionne pas et je ne comprends pas pourquoi, je suis sous prestashop 1.6 et voici le message d'erreur :

 

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 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Apache/2.4.7 (Unix) OpenSSL/1.0.1e-fips mod_bwlimited/1.4 Server at www.fetedeskdos.fr Port 80

 

si quelqu'un peut m'aider, merci par avance.