these always boil down to either a permission issue, or a mapping issue
first step, is take the path that your download client has given sonarr and see if you can get at it yourself from the same location sonarr is running (host or container)
\SEVERNAME\TV Shows Ended\Valor
if youre on a QNAP (as a package) then thats not a valid path (which is what sonarr is saying), so presuming sonarr has access you need to tell sonarr how to map that path into something that sonarr can find on the QNAP
so go into sonarr and add a remote path mapping that points from \SEVERNAME\TV Shows Ended to the equivalent location on the QNAP
note - if that path is from a download client then it really shouldnt be dumping them directly into the tv folders itself, sonarr can do that, it should just dump them into a generic “downloads” folder on the QNAP, and sonarr will process them from there
because, presuming its from the download client, thats the path the download client put the file for sonarr to pick up.
you need to create a remote path from that path to one that sonarr can actually see, and has access to.
you also need to explain exactly what you were doing. was it a download job that had finished, or were you manually importing, or something else?