Log-in to sdl machine translation

I work with sdl studio freelance plus 2019 and I installed the sdl machine translation plug-in. When  I enter my log-in data for SDL , I always get an error message. When I try to log in to the sdl machine translation cloud website with my SDL ID, the error message in the screenshot below is displayed. What must I do to use the plug-in and the SDL Machine Translation Cloud?