Same problem for me.Whew! And I thought it was something on my end! Same issue, iOS 14.4.1 FB2K 1.2.12 and it can't find any media servers, despite mconnect and VLC having no such issues. I went through the setup multiple times, re-downloaded it twice and same issue. Hope someone finds a fix or setting because it's my go-to for much of my network streaming.
Just updated foobar2000 mobile to 1.2.17 on my Iphone 11 iOS 14.4.2, and no more list of my upnp/dlna servers.
Unistalled/reinstalled and checked all the network permission, too.
Media Server page, Local Network:
No network connected!
It should list my 3 upnp/dlna servers, instead.
My Ipad Mini iOS 14.4.2, regularly works with foobar2000 mobile 1.2.14