This is a very large, 92 devices .dashboard I have used for several years. Existing and new tiles no longer have attributes available to select. I've rolled back a hub versions and a couple of days worth of backup with no resolution. I have a couple of smaller dashboards with tiles that use attributes that have no issues. I'm assuming some sort of corruption but I'm surprised that rolling back has not solved it. If I select the attribute drop down it corrupts the tile. When I restore the backup it tile returns but the attribute editing line is empty. I'm on beta .176 but rolling back to pre beta .173 was not a solution.
@sburke781 I first noticed this as I was adding the Simple CSS Editor tile to the page. I wasn't able to select the expected iframe attribute. No attributes were available. Any possibility that adding that might have corrupted the attribute data for that single dashboard. I know I was getting close to the 100 tile limit.
It feels unlikely it is related to adding the css editor, but happy to be corrected. I haven't seen that error before. Hopefully someone can help with explaining what produces the error.
You could try creating a new dashboard, add all the same devices to it, and then just copy the JSON/CSS over to it from the old dashboard to make a "copy". If the new copied dashboard works for adding attributes, and you could then delete the old dashboard.
Granted, this will be a bit of a pain with 92 devices to re-add.
