Every time i try logging onto the FTB ultimate server, it tells me i need TwilightForest 1.15.4.
I checked out the mod list and it says that its installed. anyone who have had the same problem or anyone have a solution? thank you

wait... theres an FTB server for cfuk now?

Yush! :3

Id try just reinstalling. And yup!
minecraft.crazy-fools.co.uk:25665

tried reinstalling about 3 times. still won't work

The default ultimate has build 1.15.3 b default, you need to download it manually from here

http://www.minecraftforum.net/topic/561673-151-the-twilight-forest-v1171-the-ur-ghast-awakens-new-secrets/

Figured it out. My launcher decided to make 2 "Ultimate" mod packs. only the one of them worked. :3