Comment function is not working after changing permalink structure

Hi guys,

Yesterday I have installed a redirect from my old wordpress.com to my new ww.wp.xz.cn adress and matched my permalink structure to the pre-installed wordpress.com one. Now the comment function isn’t working anymore. It’s giving me errors. When I try to submit a comment all I see in the comment box is my mirrored page.
I tried to deactivate the jetpack plugin to see if jetpack is causing the errors but I still get error messages (401 errors)
I read that a ‘/’ in the end of the link could cause these kinds of trouble but I removed it already and it’s still not working. Btw in default link structure I have no issues.

Any ideas what causes the errors or what I can do now?

Thank you!