Same here, no prompt for any consent when clicking auto rig or download textures. It comes directly to the fail login part after trying to connect to a server in the log
Even after sign out everywhere and sign in again onto epic games launcher
FIXED: Ok so it seems it was a web browser issue. i was using Arc as default browser and it didnt opened the MH Consent external link . I switched back to Chrome as default and the tab opened. Now the rig and textures works !