Open the printer in forms printer maintenance, and try to print a test page -- if you see an "invalid paper source" error like the one below, the tray names have changed:
Note the selected tray (e.g. Tray 2), then click "Refresh Printer Settings", then "Yes"
Make sure the same tray is selected again with the "new" name, press OK, and save the changes:
Go to "Map Forms to Tray" and select the same tray for each of the checked forms, then save:
Go back to the "Printer Settings" screen and print another test page -- it should print without errors:
