I am getting the same error code as described above. I use just one workstation running Windows 7 Pro and have upgraded to Ledger 9.3B (2021.01.15) and SP Ledger 9.3B (2021.02.25). I have not upgraded to SP Ledger (2021.03.31). Before doing the above work-around, I am curious if last week's SP (2021.03.31) will correct this error?