Manual media server path is broken on Asuswrt-Merlin 378.56_2

[Monty Banton]

When setting my media server setting to 'All disks shared', my USB media drive shows up through DLNA. However on changing this to 'Manual media server path' and set it to the desired folder, the USB media drive no longer shows up in Media devices through DLNA.

Can other users using Asuswrt-Merlin 378.56_2 on RT-AC68U test this out and see if it is a problem in the firmware. I suspect it is a bug in the Asus firmware...