1.6.1 does not allow NAS to be selected!!!

Further to my previous report, I have tried to install 1.6.1 on my 2nd Windows 10 system and again it will not allow me to select my library which is stored on a WDMyCloud NAS. I am currently running 1.5.x Serviio on this system using that NAS for the library.
What can I do to force (urge, coax) Serviio 1.6.1 to allow this NAS to be the source? See attached pics.
Paul
What can I do to force (urge, coax) Serviio 1.6.1 to allow this NAS to be the source? See attached pics.
Paul