Track and album names displayed with replacement character. How to resolve?

[Yukster]

I am running Minimserver on my NAS and when I use BubbleUPnP to stream music from my NAS it displays the ganre, track, and album names with replacement characters, see attachment. The tracks' order is back to front.

When I stream from my Jriver Server that is running on a PC on my network, these replacement characters are not showing.

I would be grateful for advice on how to fix this. TIA