I know NMM is E.O.L. Posting here on the off chance that someone has encountered this issue with beta 0.63.14. and can offer a fix.
Nmm working beautifully, then
Repaired my Win 7 OS by upgrading from disc (last resort to resolve a firewall problem)
Skyrim SE and most programs work fine. However, NMM has stopped launching.
Gave permisssion to allow NMM through firewall. Result: no change
Completely uninstalled and reinstalled, Result: No change
Continue to get same Trace Log error, specifically: