Can't access to Advanced Parameters/Performance page (PS 1.7.3.1)

[AZIIZ]

Hello everybody,
I tryed to transfere my prestashop 1.7.3.1 website for a server to another server (I followed some tutorials to do that and it worked well).
All is OK except one thing, I can't access to "Advanced Parameters / Performance" page, it says Error 500. But when I activate manually Debug Mode by changing config / defines.inc.php  -> define('_PS_MODE_DEV_', true);  

Performance page becomes accessible, I don't want debug mode to be enabled all the time.
How can I resolve this please.

Thanks in advance

Edited April 30, 2018 by AZIIZ (see edit history)

[AZIIZ]

Even with cache deletion the problem persists, I finally re-installed prestashop and the problem is solved.

[desger99]

Hi, I am having the same problem. Is there anyway to re-install prestashop without losing any of the information or having to upload everything again? (images, texts, productos, etc...) I know I can export some of the data, but not all my configuration and design! 

 

Thanks

[JBW]

Try to hard delete the cache folders inside var/cache/

[zeeshan ashraf]

same problem with prestashop 1.7.4.4, using website www.nksparts.com on prestashop 1.7

 

Any suggestions ?

 

also having error in non-numberic character in error_php