I'm trying to Enable Sync so my layer I create will show up in the Field Maps app so data can be collected. When I try to Enable Sync and save it keeps giving me a "Save wasn't successful. Try Again Later" error message. However, it does not give me that error if I just Enable Editing.
Any ideas?
Having same issue without solution yet.
Like many errors in ArcGIS, they will not explain why, and you will not find solution. It's just a commercial. Pay your license and use free softs.
Maybe you've already solved this by now, but check if any of your fields are the following types:
I had a Date only field that was causing the same error. I changed it to a date field instead and it saved no problem. I was able to connect it to field maps. I found this solution on this page: Manage hosted feature layer editing—ArcGIS Online Help | Documentation.
Hope this helps!