I had the same issue, persisted even after a restart of the machine. Failure happened both when running "snap refresh" and when trying to update via the "Ubuntu Software" app.
Killing the listed pid and then running snap refresh worked.
I had the same issue, persisted even after a restart of the machine. Failure happened both when running "snap refresh" and when trying to update via the "Ubuntu Software" app.
Killing the listed pid and then running snap refresh worked.