I created an empty point shapefile and uploaded it to AGOL to make a feature service. I enabled editing, added it to a web map, and added about 30 points. When I try and reopen the web map or add the feature service to a new web map the error returned is:
The layer, LakePoints, is missing spatial reference information and cannot be added to the map.
In addition to enabling editing, I edited the extents on the feature service page (the extents I set include all of the features that I added). This all happened today.