Based on the reason/error given, "The system cannot find the path specified." how would it be possible to take any action. So if you aren't able to select an action, how can the Apply button be active as there is nothing to apply.
Not to mention, this is a list of files that can't be scanned, not that they are infected or suspect, so what action if you were able to select one would you choose.
Given this is in the windows/temp folder and the file name begins with _asw_ais I would say it is likely to be associated with avast AIS and depending on what this was used for avast may well have cleared the Temp folder.
So as far as I can see this is not a bug.
