Hey,
You actually reminded me that i forgot to add the updated include file for Updater by GoD-Tony. Put a post up on the plugin thread for it.
Follow these steps and hopefully it should work out the box.
Make sure you have the required plugins:
SteamWorks by KyleS -
https://forums.alliedmods.net/showthread.php?t=229556
Updater by GoD-Tony -
https://forums.alliedmods.net/showthread.php?t=169095
Multi Colors by Bara -
https://github.com/Bara20/Multi-Colors
Then you also need to grab updated includes for a couple of plugins:
steamworks.inc - Updated for new style decals
here
updater.inc - Updated for same as above
here
Hopefully once you've done that, everything should compile fine.
If it's still not working - feel free to post back or send me a private message.