Cannot show date in Apple Watch OS7

I updated my Series 5 Apple Watch to OS7 last night. This morning, the "Date" field from my (Infograph Modular") face is missing. I went in to the complications for this face, and for the "Date" item it says "Off". When I click the arrow next to "Off", I am taken to another screen where the only option is "Off", and that option is selected (orange check mark). Clicking on "Off" or the orange arrow only takes me back to the previous screen - it seems I can't turn the "Date" function back on.

Any help would be greatly appreciated.