UM with Polylang URI too long 414

Hello,

using the special UM version from GitHub with Polylang and try to build a website with two languages. Access to the website is only allowed for registered users. I duplicated the UM forms, changed the languages and put a language chooser in my header. When I go to my website the login appears but when I want to switch to another language it doesn’t work and I get Error 414 “To many redirect / URI too long”.

If I select the UM setting “Allow access to the home page” then the language change works. However, I am not able to open the translated UM login page and I don’t know why.