Same here, in the USA, Windows 11 Home 25H2 OS Build 26200.7019
Streamfab 6.2.6.2, 6.2.6.1 and 6.2.6.0
Already submitted report and log file directly to Streamfab support.
I get the small white rectangular box that says it’s analyzing...

... then it goes right back to the Peacock Home page.

Was working fine yesterday as it had been for a very long time.
Same result in 6.2.6.2, 6.2.6.1 and 6.2.6.0. Tried on 2 different computers. Tried several series and several movies. Did an uninstall using Revo Uninstaller then a clean install but no luck.