I'm trying to set up a data channel connection between two peers with webrtc but am running into this issue on the peer creating the offer.

This is the full RCTErrorEvent object that i'm getting from the onerror callback on the data channel i've created:

This error is getting thrown when the answering client sends this SDP message back:

v=0
o=- 4032937039670154216 2 IN IP4 127.0.0.1
s=-
t=0 0
a=msid-semantic: WMS
m=application 0 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 0.0.0.0
a=mid:0
a=sctp-port:5000

Any idea how I can resolve this issue, or what mid=0 even means?

Edit: This is what the offer SDP looks like:

v=0
o=- 1617373214565242991 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE 0
a=msid-semantic: WMS
m=application 9 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 0.0.0.0
a=ice-ufrag:qoYs
a=ice-pwd:JS3NDg62V+cpJRUhEBSbMVcq
a=ice-options:trickle
a=fingerprint:sha-256 7A:C5:F6:CB:C0:94:44:12:22:C5... (removed)
a=setup:actpass
a=mid:0
a=sctp-port:5000
a=max-message-size:262144