I don't know if this will help get rid of the particular error (as you say no way of knowing what it is about).
But try the 'Open & Repair' option when you open a file from the FILE menu.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10