Login Issues after moving to IIS

Hey :wave:

I have the following problem in our environment.
Kanboard is currently installed on a Windows server running Apache and I wanted to move it to IIS.
I used the instructions provided.
So far so good.
After the move, the page loads but login is no longer possible.

There is no direct error, but in the login screen it says “The username is required” and “The passowrt is required” No matter if with locally created user or synchronized via LDAP.

So far I suspect the Rewrite Rules, but with the info from the manual I can’t really figure it out, because I already have the web.config stored that way.

Maybe I just configured something wrong.

About the installed system:

Version: 1.2.27
PHP Version: 8.1.5
PHP SAPI: cgi-fcgi
HTTP client: socket
OS Version: Windows NT 10.0
Database Driver: mysql
Database Version: 8.0.32
Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0 Safari/537.36 Edg/113.0.1774.42

Any help would be appreciated.

Best regards