tls: no cipher suite supported by both client and server about galene HOT 1 CLOSED

tls: client offered only unsupported versions: [300]

This looks like a non-TLS client attempting to connect. I wouldn't worry.

error when handling datagram: failed to handle Allocate-request from 73.38.140.198:57891: relay already allocated for 5-TUPLE

Yes, there are some issues with the built-in TURN server (see for example pion/turn#206 or pion/turn#144). Probably nothing to worry about, Galène should recover within 30s from failed TURN connections, but something that needs fixing at some point.

turn ERROR: 2021/03/17 19:52:30 error when handling datagram: failed to create stun message from packet: unexpected EOF: not enough bytes to read header

That probably means that somebody sent an empty packet to your TURN server. Probably nothing to worry about.

2021/03/17 03:25:49 ICE: unknown id in ICE

That means that a connection was closed before it was fully negotiated (for example, a user clicked Ready and then immediately clicked Panic). The server is receiving negotiation messages for a connection that no longer exists. I should probably detect this case and do something about it, not sure how to do that, though.

from galene.