This appears to be a duplicate of https://bugs.launchpad.net/ubuntu/+source/command-not-found/+bug/1876034. It may be worth holding off using the "Mark as duplicate" function as it hides the duplicate from the search results. Since 1876034 doesn't contain the error the end-user sees (this bug report does), it would be easy to miss there's an existing issue raised (and already one other bug report marked as duplicate).
This appears to be a duplicate of https:/ /bugs.launchpad .net/ubuntu/ +source/ command- not-found/ +bug/1876034. It may be worth holding off using the "Mark as duplicate" function as it hides the duplicate from the search results. Since 1876034 doesn't contain the error the end-user sees (this bug report does), it would be easy to miss there's an existing issue raised (and already one other bug report marked as duplicate).