I used TY2016 for TY2016 and prepared more than 50 returns.

Now, in 2020, I need to prepare a TY2016 return for a client.

When I try to load the TY 2016 program, i receive this error code:

"Error building cache 209 TY2016"

I also downloaded the TY2016 program and reinstalled it. 

Same result: "Error building cache 209 TY2016"

Any help?