Backoffice White Page after Template Change

[chris821]

Hey Guys,

 

im new in the Prestashop Community, and first of all i want to say hi everybody! :-)

 

I got a problem with my prestashop 1.7.1.1 system.

 

Everything worked fine, than i tried to change the template in the back office, since then the system (Backoffice) doesn´t work anymore. There´s just a white site displaying. 

 

The frontpage is still working.

 

Do you have an idea what could cause this problem?

 

 

Edit:

 

If i change the following define to true, i can reach the backoffice in the debug mode.

/* Debug only */
if (!defined('_PS_MODE_DEV_')) {
define('_PS_MODE_DEV_', false);
}

but if i set the debug mode to false, i can not rech the backend anymore .. 

 

What can cause this Problem?

Edited June 22, 2017 by chris821 (see edit history)

[chris821]

SOLVED - if anybody got the same problem:

 

 

i deleted the folder app/cache ... now its working!