Sims can't get married

I set the Wedding event, changed the lot type to WE, had an arch and guests but when clicking the arch Get Married was grayed out saying my other Sim wasn't on the lot even though they were holding hands right in front of the arch. I tried moving them around, I restarted without saving and tried the wedding event again, same issue. I removed some main mods and new cc and restarted multiple times. I went to steam and verified files. Nothing worked.