This just started happening to me this morning:   ProSeries 2020, 2021 and 2022 can't save without giving me that CreateOneFont(c) Code 0 error and crashing the program.

The person in 2021 said he solved it by updating his Windows 10.  I've gotten lots of Windows 10 updates since 2021.   What do I do today about it?  ProSeries is not functional this morning.   On January 21, that's a problem.  On January 23, 2023, that becomes a disaster.