Kicked out of room if anyone is in, or enters (conference.offerAnswerFailed)

I am using meet.jit.si, but it happens with any other server too.
It only happens when I am using Firefox, otherwise it is doing fine.
This is the error that I get in the webpage console:

CONFERENCE FAILED: conference.offerAnswerFailed DOMException: "SIPCC Failed to parse SDP: SDP Parse Error on line 35:  Warning: Invalid named events specified for fmtp attribute.
SDP Parse Error on line 32: No rid attribute for 'rid=1'
SDP Parse Error on line 32: No rid attribute for 'rid=1'

Any ideas on how to make it work?