What player other than VLC can play .rar files (read all)?
Most decent players will happily play things that are damaged or incomplete, BSPlayer, Media Player Classic etc can be downloaded free trial and free of charge respectively. Just because you can play the contents of the .rar in VLC doesn’t necessarily mean it isn’t damaged. You may find you only have half the show or something similar. WinRAR will only give you those errors if they’re pertinent so I would take notice and perhaps seek a different source for your file/download. For the sake of legal wrangling I must stress that you should only download files which you are legally entitled to!