Done Mismatched Id's?

Every time i try to connect to the server it wont let me join, its fine when i try to connect to the hub

Screenshot:
Gyazo - d9fc666dc5747311f3ba45425f777ed1.png

How to fix? Thanks, been having a lot of fun and would like to continue playing

 

Are you using the MYM launcher?

 

Wrong version? Try reinstalling everything if or as @chugga_fan said, simply use the MyM launcher to make your life easier.

 

No but i have not had any troubles before now using FTB Launcher @chugga_fan

 

@vTwizl Are you sure that you are using the most up to date version of the modpack?

 

What ever version the FTB Launcher has recommended is what we use.