back office not working after Design - Theme & logo - Choose layouts

[sygram]

Hi there,

i installed and configured latest prestashop 1.7. Everything was fine till i clicked Choose layouts (Design - Theme & logo). After that the backoffice just gave me a blank screen. I managed to change the file defines.inc.php and set debug mode _PS_MODE_DEV_ to true. Somehow my shop's backend works now, but no error is displayed. So i am forced to use debug mode always now because when i set it to false, i always get the blank screen. Front works fine in both cases.

Does anyone know how to fix this ? The only thing that i did is Choose layouts.

Thank you very much. I really appreciate your replies.

Regards

[shokinro]

Actually I have had similar situation sometimes. It seems a bug of PrestaShop itself. when you use DEV mode, it works fine, but when you switch back to production mode, it has issues. You may try to clear the cache to see if it fixes - since it seems working for me sometimes.

 

For production mode

/app/cache/prod/*

 

for DEV mode 

/app/cache/dev/*

 

[musicmaster]

Did you check the source code of your page: right click in your browser and check page source. You might find some error or warning there.

 

You could also look into the PHP error log file of your server. A blank page should generate an error message there.

[sygram]

Thank you both,

 

i confirm that shokinro's solution worked like a charm !

 

Thank you very much. I really appreciate it.

 

Regards

[shokinro]

glad it worked and thanks for your feedback!