"Some nodes are invalid" but they are all connected

[gottoesplosivo]

I'm trying to use playlist maker to update a playlist I previously made with the same tool
I was able to create a first playlist, now I've added another artist and get the error "Some nodes are invalid" and I don't understand why

[ReVerseYTReal]

oh. i figured out the reason. if you dragged out any of the nodes thinking you wont use them, then forgot, it will still try to connect it. try zooming out?

[gottoesplosivo]

oh. i figured out the reason. if you dragged out any of the nodes thinking you wont use them, then forgot, it will still try to connect it. try zooming out?

I thought it could've been that but I don't have any unconnected nodes. If I create a new one it seems to work...

[ReVerseYTReal]

If I create a new one it seems to work...

weird..