Wrong ItemID added to login-URL

EasyDiscuss is adding the get-var "&Itemid=101" to the URLs, this is our home URL and not working, e.g.:
https://ludothek.info/component/users/?view=registration&;Itemid=101



without
https://ludothek.info/component/users/?view=registration
or with the correct ItemID its working:
https://www.ludothekprogramm.ch/component/users/?view=registration&;Itemid=121

I have tried to set the ItemID in the easyDiscuss SEO settings, but it has no effect

Some time ago this links have worked, it problem was coming with a joomla or easyDiscuss update.

thank you for your help!

Stefan