I got up to the Skal! quest (never did any of it) and it was late so I manually saved and quit for the night. After loading back to the game, my manual saves where stuck on infinite loading.
I tried a suggested resolution from this thread that is similar issue
https://discussions.ubisoft.com/topic/103188/siege-of-paris-after-skal?lang=en-US
I uninstalled Siege of Paris and that let me load into Ravensthorpe.
I then manually saved, quit the game and reinstalled Siege of Paris.
Started game back up and once in Ravensthorpe, tried to fast travel to Francia and get the infinite loading screen again.
I even tried having Pierre take me to Francia and same thing, infinite loading screen.
As it stands right now, I can't finish Siege of Paris content since I can't get to Francia.
Here is a video of the infinite load screen, I've let it go for 20-30 mins and nothing
https://drive.google.com/file/d/1djzgYrHAIACuB39fgXNTCv2DYeYymcWu/view?usp=drivesdk