OTR interoperability with Psi+ does not work

When one party in a conversation is using Tor Messenger and the other is using Psi+, no OTR-session can be established. This fails in both directions.

Steps to reproduce:

Start Tor Messenger and initiate a conversation with a Psi+ user
Start an OTR-session from either end.

Expected outcome:

Tor Messenger will establish an OTR-session with the party using Psi+ on the other end.

Actual outcome:

No OTR-session will be established.

Trac:
Username: niemalsnever

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