iPadOS Beta - connecting Files app to Time Capsule

So, I’m running the iPadOS 13 public beta (and loving it so far) and have been struggling with connecting to my 4th Gen. Time Capsule via SMB in the Files app, so far without success.

Has anyone done this with success?
I’m using the standard “admin” & the password - which works for
FileBrowser, my TV etc., and as the address I’ve tried using the local IP but that results in “Broken RPC-structure” - if I use the local path from FileBrowser it just time-out.

Any suggestions?