Luis_ST

the debug log does not show any errors, make sure you post the full log if this was the full log, post launcher log

which version of Forge did you use and which java version?

post debug log

this is handled by Item#isFoil, but the method does not provide a Player so you need to replace the way vanilla renders the Armor As far as I can see, Item#isFoil is only executed on the client (in vanilla code), that would mean that you would get a player via Minecraft.getInstance().player so you be able to check if the Player is wearing your Item, note you should make a check if you are really on client via: FMLEnvironment.dist == Dist.CLIENT note you also need to handle a else case, means a other Mod is calling Item#isFoil on server

post full debug log please

why are you extending ItemColors, you should implements IItemColor, also do never use @OnlyIn it's for vanilla only

Problem with Structure Gel. Make sure you are using the latest version. If the Mod is already up to date, report this bug to the Mod author.

Problem with Immersive Engineering. Make sure you are using the latest version. If the Mod is already up to date, report this bug to the Mod author.

run the server from the command line and post full output

post the error you get

the log does not exists

delete the server config file, it's in the world directory

the server must be run via the .bat/.sh file, if the server host does not support this they need to update

it's a interface so you need to implements it, but basically yes it's an Event you need to subscribe to it, then you be able to call ColorHandlerEvent.Item#getItemColors and then ItemColors#register to register your IItemColor implementation you can take a look at ItemColors.createDefault to look at the vanilla implementations

post debug log from server and client

the mod id must be full lower case

do this and post full output

post debug log

post debug log

then post debug log without MTR

that's not possible, post debug log when you use the latest version

in which step do you get a error?

subscribe to LivingEquipmentChangeEvent. then add the Effect if the Item with your conditions is the new Item for the Slot, if the new Item equals old Item do nothing, else remove the Effect

show what you tried what did you tried to achieve?