18 hours ago, Rhobur said:compare your modules folder with the one from the prestashop archive (download it if you don't have it already) then rename one by one the extra modules in your folder (not in the archive) and test if the problem is gone after each rename; when you find the culprit rename back the others.
did that, still same problem 
In my hosting panel, under CMS tab, it says installed PS ver. 1.7.5.2. Shouldnt be 1.7.8.2 after upgrade? 