LittleKitsu

Thank you, nonetheless.

Then it already was directed to the proper spot automatically?

By main directory, do you mean where I want the files to go- or where Forge wants the files to go?

Would you be able to explain it then?

I'm not seeing a picture in your post?

Yes, I have.

So I've been going through the setup process for IntelliJ, and it went smoothly for the most part, however when I reached this step: Finally, assuming you use IDEA 2016 or newer, you will have to fix the classpath module. Go to Edit configurations and in both Minecraft Client and Minecraft Server, change Use classpath of module to point to the task with a name like <project>_main. I wasn't able to find what it was talking about under Edit Configurations. The version of IntelliJ I am on is 2016.3.4.

I am new to using third-parties such as forge to assist with my programming. I've only ever used IntelliJ and Eclipse before- because of this I'm not entirely sure how I should go about updating Forge's MDK to its latest version. Is it a simple process of replacing files or do I have to delete the older version and then go through the process of reinstalling it via Command Prompt again? Thank you for your time.

I am familiar with Java- unfortunately, I am not familiar with Command Prompt, I also wasn't sure where precisely I was to direct the command prompt to and how I was to make that happen. I do have a JDK along with two JREs. However, I was finally able to get the answer I was looking for after reading how I need to direct the command to a JDK rather than a JRE- which took only a few internet searches. Thank you very much for taking the time to answer my question, I attached the result of the successful build just in case I overlook something that may affect me as I push forward in modding Minecraft. Thank you again for your consideration.

Thank you for moving it to the right section. I read it but I'm sort of learning as I go and would like help understanding what it is I'm reading and how to resolve it. Thank you for your help. Also, I'm not sure if it's relevant for this error- but I'm going to use IntelliJ for my modding.

Before I state my problem, I want to say at which point I got to before I got stuck: I already downloaded the MDK, I pulled out the following files: built.gradle, gradlew.bat (I couldn't find the gradlew.sh though), and the gradle folder. I then opened command prompt at the folder directory and executed the following command: setupDecompWorkspace. It ran fine- and took roughly an hour to reach the error. After a while of searching and using recommended fix commands for the download, I decided to take these two screenshots of two different occasions of this error. I'm not sure what the error is telling me, so could anyone who does know walk me through the steps to correct it- it would be much appreciated. Thank you.