page=2 not loading and seach by not working

[sbmonline]

Dear forum,

i am currently trying to move my shop from shopify to prestashop.
I experience a problem since yesterday, i have made a video, please check:

https://storyxpress.co/video/kqp9fb9wf157mqqxq

i use

Prestashop 1.7.7.4.
Browsers: Chrome and Opera

 

Problem 1)

After trying to click to page 2 the right link shows up in the URL line of my browser, but the content of the site won't load. The content is empty. After i reload the site manually it will work and content of page 2 will show.

Problem 2)

Same thing with "sort by". It will reditedt to the right page but i would have to mannually confirm the URL in order to make it work.

Thank you very much for your help!

Best regards,
Steffen