I rebooted my PC and same result. Attached a screen shot of the error thread from initial command.
Here is the first error
[WinError 32] The process cannot access the file because it is being used by another process: ‘C:\\Users\\Jim Moore\\Dropbox\\Jim Moore Private\\Arduino\\LearnEnviroDIYcode-master\\.pio\\libdeps\\mayfl
I have no clue what process would be using the file unless its dropBox syncing.