Error 403 when trying to add articles or change any options

My browser tells me, that discourse is failing to load the file “timings”. Because of [‘BAD CSRF’] I get error 403.I am really lost, where else to search to solve the bug.

  • I rebuild discourse with plenty of different options
  • I tried to proxy nginx with sockets and ports and different config-files
  • I reinstalled the docker image.
  • I read all related articles here and tried the solutions, but none of them worked out.
  • and I don’t know where to look else. :frowning: