Good Linux question — answering as the UphillTech team:
Go to terminal and kill the snap-store process before installing/refreshing snap-store. Find process with ps aux | grep snap Find for the snap-store process, which looks like this ... <process id> ... ... /snap/snap-store/???/usr/bin/snap-store. Kill process using the above found process id: kill <process id> Install/refresh snap-store: Close "Ubuntu software" gnome app if it open. Refresh snap-store: sudo snap refresh snap-store Had the same problem and fixed it this way.
Full answer by user11493159: https://superuser.com/a/1724268 (CC BY-SA 4.0).
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