Unable to play on FTB Revelations Server

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Encartias_RS

Guest
Title Unable to play on FTB Revelations Server

Launcher Type Twitch Desktop App

Modpack FTB Revelations

Modpack version 2.0.0

Have you modified the pack? Yes

Link to log file https://paste.feed-the-beast.com/view/ed02907b

Details of the issue Added Millenaire and Veinminer

Im hosting a server on my pc with the above modpack. While I can join and play on the server fine my friend cannot. The most notable error in the log seems to be this....

[17:28:57] [Server thread/ERROR] [FML]: FMLIndexedMessageCodec exception caught
io.netty.handler.codec.EncoderException: java.lang.RuntimeException: Undefined discriminator for message type DimensionPermissionPacket in channel jm_dim_permission

I have tried installing the latest version of Java on their machine aswell as temporarily disabling windows firewall but neither has helped. Any advice on this would be appreciated.

Thankyou
 
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