Forge MDK not working in IntelliJ: Cannot resolve symbol 'userdev'

[strugglingdevjin]

Minecraft version 1.14.4 and Java 1.8

 

I have an idea of what's broken but I don't have a solution

 

Under main class: net.minecraftforge.userdev.LaunchTesting (Cannot resolve symbol 'userdev')

 

Under Gradle: Unable to resolve net.minecraftforge:forge:1.14.4-28.1.07_mapped_snapshopt_20191218-1.14.4

 

when I runclient in Gradle, this is the log:

Error:(3, 27) java: package net.minecraft.block does not exist
Error:(4, 27) java: package net.minecraft.block does not exist
Error:(5, 33) java: package net.minecraftforge.common does not exist
Error:(6, 32) java: package net.minecraftforge.event does not exist
Error:(7, 39) java: package net.minecraftforge.eventbus.api does not exist
Error:(8, 30) java: package net.minecraftforge.fml does not exist
Error:(9, 37) java: package net.minecraftforge.fml.common does not exist
Error:(10, 46) java: package net.minecraftforge.fml.event.lifecycle does not exist
Error:(11, 46) java: package net.minecraftforge.fml.event.lifecycle does not exist
Error:(12, 46) java: package net.minecraftforge.fml.event.lifecycle does not exist
Error:(13, 46) java: package net.minecraftforge.fml.event.lifecycle does not exist
Error:(14, 43) java: package net.minecraftforge.fml.event.server does not exist
Error:(15, 41) java: package net.minecraftforge.fml.javafmlmod does not exist
Error:(16, 32) java: package org.apache.logging.log4j does not exist
Error:(17, 32) java: package org.apache.logging.log4j does not exist
Error:(22, 2) java: cannot find symbol
  symbol: class Mod
Error:(26, 26) java: cannot find symbol
  symbol:   class Logger
  location: class com.example.examplemod.ExampleMod
Error:(42, 30) java: cannot find symbol
  symbol:   class FMLCommonSetupEvent
  location: class com.example.examplemod.ExampleMod
Error:(49, 38) java: cannot find symbol
  symbol:   class FMLClientSetupEvent
  location: class com.example.examplemod.ExampleMod
Error:(54, 35) java: cannot find symbol
  symbol:   class InterModEnqueueEvent
  location: class com.example.examplemod.ExampleMod
Error:(60, 35) java: cannot find symbol
  symbol:   class InterModProcessEvent
  location: class com.example.examplemod.ExampleMod
Error:(69, 34) java: cannot find symbol
  symbol:   class FMLServerStartingEvent
  location: class com.example.examplemod.ExampleMod
Error:(76, 9) java: package Mod does not exist
Error:(79, 64) java: package RegistryEvent does not exist
Error:(79, 74) java: cannot find symbol
  symbol:   class Block
  location: class com.example.examplemod.ExampleMod.RegistryEvents
Error:(68, 6) java: cannot find symbol
  symbol:   class SubscribeEvent
  location: class com.example.examplemod.ExampleMod
Error:(78, 10) java: cannot find symbol
  symbol:   class SubscribeEvent
  location: class com.example.examplemod.ExampleMod.RegistryEvents
Error:(26, 42) java: cannot find symbol
  symbol:   variable LogManager
  location: class com.example.examplemod.ExampleMod
Error:(30, 9) java: cannot find symbol
  symbol:   variable FMLJavaModLoadingContext
  location: class com.example.examplemod.ExampleMod
Error:(32, 9) java: cannot find symbol
  symbol:   variable FMLJavaModLoadingContext
  location: class com.example.examplemod.ExampleMod
Error:(34, 9) java: cannot find symbol
  symbol:   variable FMLJavaModLoadingContext
  location: class com.example.examplemod.ExampleMod
Error:(36, 9) java: cannot find symbol
  symbol:   variable FMLJavaModLoadingContext
  location: class com.example.examplemod.ExampleMod
Error:(39, 23) java: package MinecraftForge does not exist
Error:(46, 47) java: package Blocks does not exist
Error:(57, 9) java: cannot find symbol
  symbol:   variable InterModComms
  location: class com.example.examplemod.ExampleMod