Chiming in with yet another alternative, I had success with https://github.com/psanford/wormhole-william which is also Go, but is compatible with the original python wormhole.

I think the main difference is that webwormhole tries to use STUN/firewall hole punching to connect two nodes, while the original implementation will use a TCP-TCP relay as fallback.

I recently needed to transfer a 30 GiB file within a restricted network but the firewall blocked webwormhole, so I ended up with -williams instead.

Hopefully at some point all these project can converge into something that supports ALL the solutions :-)