Miele Modern - Loaded in HACS, Flashes Setting up integration but never prompts


I have installed the HACS integrated Miele (Modern) add-in. It loaded up, I rebooted system, then added Integration. After this, the setting up integration stayed on screen for some time, then dissappeared. No prompt to login at all. I have tried removing completely, and clearing any cached files.

Appreciate any advice. Thanks