Swap URL can't be accessed, IP appears incorrect

I suspect that F-Droid on my Nexus 6 may be detecting the local IP address(es) incorrectly. Of course there may be more than one of them!

I've tried NFC, QR code, and manual URL entry, all while direct wifi was enabled on both sides, and none of them worked.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information