From the message, it looks like there were two Document folders one was Root and another was Mounted folder. Either the folders should have been removed or changed.
Try to add the mounted folders again and place a PURCHASING_LAYOUT.QVW file in both the locations and check it out.
In the source document folder if the PURCHASING_LAYOUT.QVW task had been deleted, you can find it in the orphan folder to see the distributed file path.
If above solution doesn't work and if it's a small deployment, then you can delete the PGO files and restart the services to regenerate it again, it would recover the licenses but the licenses user configuration will be lost and you have to setup it again.