Connect tutor to OpenEdxMobile android

i removed the port(8000) and it worked. But now i get this error when i try to register a user although it registers the user:

E/org.edx.mobile.util.images.ErrorUtils: org.edx.mobile.http.HttpStatusException: Response{protocol=http/1.1, code=400, message=Bad Request, url=https://domain/oauth2/access_token/

the issue is now i cant sign in, i am using the latest android release, this error looks like the 400 error during sign in on Android app · Issue #289 · overhangio/tutor · GitHub

in the browser i get this:

{“error_description”: “Only POST requests allowed.”, “error”: “invalid_request”}

any suggestions.
thanks