style is gone after changing general product settings in backoffice

[GranWizard]

Hi there!

 

when I change my backoffice settings:

settings > producs > productpage (section) > show availble quantaties on product page > TO YES (a)

or > display the available stock when lower then > AND PUT A NUMBER IN THAT FIELD (b)

the style of my shop is totally lost. No theme is loaded, webshop is displayed really bad.

 

Is there anyone that is familiar with this problem? Or what could be a solution?

 

Edited December 29, 2017 by GranWizard (see edit history)