Problems connecting Google Home to Home Assistant

I did a fresh reïnstall on my HA instance. After this i wanted to connect Google Assistant/ Google Home back to my HA. Fully followed the manual, when i want to connect it via the Google Home app it loads the HA login screen. But when i login it says “Something went wrong, try again”

Does anyone have any idea how to solve this problem?

My HA is running via a Cloudflared tunnel for remote access.