Thanks, but either way it works…
For anyone who wants a temporary fix until this gets straightened out (and I’m sure it will, this is an AWESOME plugin), just go to archive.org and use the way back machine to go to a past version of the download page for the List Category posts plugin. I used it to get back to .53 earlier today.
I have the same issue as maryannkelley with .54.1. I removed excludeposts=this from one of my posts which was having the issue and the error no longer appeared, but I’d much prefer to see that feature retained.
