Joining a session created with RelayProtocol.WSS throws Mismatched Relay configuration ArgumentException

Package: Multiplayer Services

Fixed

1.2.X

1.2.0 onwards

The RelayProtocol set in joining clients through the SessionOptions is properly used when joining a session instead of the default platform value. Known issue: The RelayProtocol option is not available when using MultiplayerServices APIs with the JoinSessionOptions or ReconnectSessionOptions (i.e: JoinSessionByIdAsync, ReconnectToSessionAsync, ...) preventing using these APIs with a custom RelayProtocol. Work is being planned to allow this behaviour in a future version.

Steps to reproduce:

Open the attached project
Open the MainMenu Scene
Open the Multiplayer Play Mode Window and start a Virtual Player
Enter Play mode
In the Game view, enter a Player name and press Enter (This will enable the "Play Now!" button)
Press the "Play Now!" button (This will transition the menu to the lobby screen)
Repeat steps 5 and 6 in the Virtual Player window

Actual results: Virtual Player is connected to the session without issues

Expected results: Virtual Player is not connected to the same session, and errors related to Mismatched Relay configuration ArgumentException are thrown

Reproducible with versions: 1.2.0 (6000.2.11f1, 6000.3.0b9, 6000.4.0a4)

Not reproducible with versions: 1.2.0-pre.1 (6000.2.11f1, 6000.3.0b9, 6000.4.0a4)

Can’t test with versions: 1.1.8 (RelayProtocol.WSS was not yet available)

Tested on (OS): macOS 26.0.1

Joining a session created with RelayProtocol.WSS throws Mismatched Relay configuration ArgumentException

Package: Multiplayer Services

Fixed

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Have a workaround or additional info about this issue?

Joining a session created with RelayProtocol.WSS throws Mismatched Relay configuration ArgumentException

Package: Multiplayer Services

Statuses

Fixed

Resolution Notes

Description

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Have a workaround or additional info about this issue?