I made a copy of a perfectly functioning xPages application onto a Domino 9 server, and it came up, briefly, but then started throwing errors. I removed all the list.unshift() commands because it was having trouble with those. Now I'm getting this, and have NO idea what it means:
java.util.Vector incompatible with javax.faces.model.Selection
I can't copy the entire stack trace, because it's on a different network. But is there any way to tell from the stack trace WHERE this problem is occurring? I've rebuilt the entire database, and have no errors. I'm baffled what the problem is, or what would work on 8.5.3 and absolutely not work on 9.