Pipe has been working for six months, but today message that pipe deleted - no results
you say "pipe deleted - no results" but if your pipe is showing as deleted you wouldn't get "no results", so I quite puzzled here.
Moreover, your pipe works fine for me (but if you do not use the filter you should take out the empty line).
I'm getting this error as well. Although I can still edit the pipe, when I press "Run Pipe" I get - "No such pipe, or this pipe has been deleted".
If nothing else works, clone it and run your copy.