Same problem in the 2021 tax program.

I have repeated this "solution" 4 times already.

Each time, I can open the program and retrieve acks, but then the error message appears again.

Lather, rinse, repeat - I now how EF - Old, EF - Old (2),  EF - Old (3), and  EF - Old (4).

Surely, Lacerte can fix this already?????