Update AGOL from ArcGIS Pro - Token Access Failure

ModernElectric

Good Morning. I have been having a specific issue for awhile now and cannot figure out how to resolve it. I have a number of different File GDBs that I started in ArcMap and have recently opened/loaded into ArcGIS Pro. The purpose of doing that is to update my company's ArcGIS Online Feature Layer. I have around 6 different ArcGIS Pro Map(s) for a different GDB that I update/override a Feature Layer in ArcGIS Online. There is (1) GDB/Map that is giving me a constant error and WILL not update. I get an Error that says:

   Unable to connect o portal - token access failure. 

My username and password has not changed and I have no problems updating other map(s)/GDB. The Error Log does not tell me why its failing. 

Any ideas?

I have tried deleting the Feature Layer in AGOL and reshare it with the same issue. 

Thank You

ModernElectric

Peter:

   That was my first thought was there was a problem with the File GDB. So, I went through and created a new File GDB and imported the Feature Class(s) into it from the existing GDB (Via Feature Class to Feature Class tool). Apparently, something within the existing File GDB that AGOL's update procedure did not like it. I was able to successfully update the Feature Layer via ArcMap, along with the Python Script collection I have. 

   Still do not know what the problem initially was, but I spent a good day and a half "rebuilding" my working GDB.

Thank You