Running Stata 17 on Mac OS 11.6.6.

Until two days ago (1/6/22) I was able to run the following commands:

Code:
mi est, saving(miest, replace): reg TargetCost_Val TargetCC* BuyerCost_Val
quietly mi predict TGVPred using miest
Now the first of the two lines fails with

file miest.ster could not be opened

The coding has not been altered in any way. So what could have changed to have caused the file access to fail where previously it functioned without a problem?