Button Reloads

Hi team,

I am experiencing an issues, and hope you can help:
2: Pledge: When I want to back a campaign using pledge button, only the page reloads, nothing happens.. I’m not redirected anywhere (cart, checkout..) and no message is shown.
It just redirects..

I have disabled all other plugins (except wc) and changed to default theme -same case.

Please advise, do you have an idea what is causing this and how to fix it?

Thank you in advance.Cheers!