IntelliJ IDEA Minecraft Launch Error

Hello everyone! I have recently got into the whole idea of modding and I ran into Pahimar's Lets Mod Reboot tutorial series. I decided for learning purposes I would go ahead and try out IntelliJ IDEA, the IDE he said that he likes to use now instead of Eclipse.

When launching Minecraft to make sure I have all of the files installed correctly, I get this error in the terminal:

Exception in thread "main" java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\Seth\.gradle\caches\minecraft\assets\indexes\{ASSET_INDEX}.json (The system cannot find the file specified)

at com.google.common.base.Throwables.propagate(Throwables.java:160)

at GradleStart.setupAssets(GradleStart.java:273)

at GradleStart.startClient(GradleStart.java:81)

at GradleStart.main(GradleStart.java:55)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

Caused by: java.io.FileNotFoundException: C:\Users\Seth\.gradle\caches\minecraft\assets\indexes\{ASSET_INDEX}.json (The system cannot find the file specified)

at java.io.FileInputStream.open(Native Method)

at java.io.FileInputStream.<init>(FileInputStream.java:146)

at java.io.FileReader.<init>(FileReader.java:72)

at GradleStart.loadAssetsIndex(GradleStart.java:279)

at GradleStart.setupAssets(GradleStart.java:217)

... 7 more

I have even ran gradlew clean --refresh-dependencies in the command prompt to update outdated files like he said to do for someone with the same problem as I have, and I'm still getting the error message.

Anybody know how to fix this? Thanks in advance!

Run gradlew setupDecompWorkspace again.

Thank you kindly.