Installation module Ebay " 500 Internal Server Error "

[Stockmultimedia]

Bonjour, J"ai installer le module ebay sur mon site prestashop 1.6.0.14

Je rencontre un problème. 

Toutes les 30 minutes environ une page blanche sur viens avec marqué :

 

Internal Server Error

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

Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error.

 

 

Quelqu'un aurait-il la solution pour régler ce probleme ? 

 

Merci beaucoup

[tuk66]

Il ne peut être lié au module eBay. Qu'est-ce que la mémoire PHP et le délai que vous utilisez? Tous les messages dans le journal du serveur?

 

It may not be related to the eBay module. What PHP memory and timeout settings do you use? Any messages in the server log?

[GTR]

1) clicked on EBAY link at backoffice:
/Backoffice/index.php?controller=AdminModules&showInstalledModules&token=XXXXXX&install=alipay&module_name=alipay&redirectconfig

2) Site gives an error:
[Thu Jun 16 20:43:38 2016] [error] PHP Fatal error: Uncaught --> Smarty: Plugin tag "cleanHtml" already registered <-- [Thu Jun 16 20:43:38 2016] [error] thrown in /var/www/vhosts/47/187801/webspace/siteapps/Prestashop-239658/htdocs/tools/smarty/sysplugins/smarty_internal_templatebase.php on line 449

3) Traced it back to the file on line 449 and commented out the throwing of the exception

This resolves the issue and the website is working, but somehow it's already registered. How can I fix this?