500 Internal Server Error/ can't access admin panel Prestashop

[Glg7]

Hello,

 

I have a problem while adding the module "customer connection link", an error occurred:

 

The server returned a "500 Internal Server Error".

Something is broken. Please let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.

 

I can't access admin panel Prestashop. 

 

Thanks for your help in advance.

 

www.ubbo.fr

 

Prestashop 1.7

Classic

Edited June 5, 2017 by Glg7 (see edit history)

[inssanee]

I have the same error, this is the log:
 

[05-Jun-2017 11:48:58 US/Eastern] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/zrwheels/irw.mx/config/bootstrap.php:132) in /home/zrwheels/irw.mx/classes/controller/FrontController.php on line 798
[05-Jun-2017 11:48:58 US/Eastern] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/zrwheels/irw.mx/config/bootstrap.php:132) in /home/zrwheels/irw.mx/classes/controller/FrontController.php on line 799
[05-Jun-2017 11:48:58 US/Eastern] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/zrwheels/irw.mx/config/bootstrap.php:132) in /home/zrwheels/irw.mx/classes/Tools.php on line 198

What do i do?

[Glg7]

I did rename the module (customersignin) on the FTP so it works for now.  But i don't know how can make it works this module.