Can not add any new domain since update to 2.1.43

Hi Folks, unfortunately i can not add any domain since i did the last update. I don´t get any error message at all but as i open the menu administration / websites i do not see any mask/field to add new domains. I have tested it with firefox and chrome but same result. And yes i was logged in with the superuser account.
ANy help on that available?
Thanks in advance!

Hi Carsten

could you create an issue on the bug tracker: Issues · matomo-org/piwik · GitHub

and could you send me your Piwik info (url, login, pwd) by PM on the forum? i will take a look