1700 copies of MyAccount duplication

Hi, I’ve had a big problem for days.
After the installation of WPML CMS and String Language Plugin, the page My Account is duplicated thousands of times in one minute. Shortly the procedure:
I want to translate any page into English (in my example TST (point 1) ). In the frontend I open this page afterwards (point 2) in the English translation and already a thousand copies of MyAccount are produced in the backend. I can’t find the error. can you help me?. It doesn’t seem to be due to WPML or the translation, because only the page MyAccount is duplicated a thousand times, no other page.
Thank you very much.
Kind regards Kirano