I think I exhausted this app as after an hour or so all I get is error messages no more searching and applying album art anymore it dies (SAD)
From which external source do you get your album art?
What are your exact steps until you get at this point?
Could you please share a screenshot from the error message?
What is sad is that a week has gone by since @LyricsLover asked you for details.
If you think that you have found a problem in Mp3tag then please tell us how to reproduce it. Otherwise it won't get fixed. And if you fixed the problem yourself, please share your solution.
Perhaps the album art site has imposed limits to prevent its servers from being overloaded by user queries. When you encounter such a limit, all that you can do is to try again later.
It was not a problem with Mp3tag I was my own worsr enemy I wasn't executing the program properly