Ugh. Picked up a new Apple Watch Series 6 today. Hoping this might solve some of the woes posted above. It did not. The problems persist and I can't seem to get any of the complications or watch faces to customize like I want them or like I used to be able to do. Is anyone else having similar issues with this app right now? I'm hoping maybe these bugs are attributable to the new iOS and Watch OS.
It seems where everyone else has a "more" option when setting up complications, I have none.
Try deleting the app from the watch and reinstalling it. That worked for me.