MPFighter

I think I solved it.

When I tried running GenEclipseRuns in terminal I got this error: A problem occurred configuring root project 'forge-1.15.1-30.0.50-mdk'. > Could not resolve all files for configuration ':_compileJava_1'. > Could not find client-extra.jar (net.minecraft:client:1.15.1). Searched in the following locations: file:/Users/Cody/.gradle/caches/forge_gradle/bundeled_repo/net/minecraft/client/1.15.1/client-1.15.1-extra.jar

ok then

I'm also having the same problem. When I run the commands listed above, it also gives the same problem. i restarted my computer and tried again but it still gave me the same problem. What should I do? A problem occurred configuring root project 'forge-1.15.1-30.0.50-mdk'. > Could not resolve all files for configuration ':_compileJava_1'. > Could not find client-extra.jar (net.minecraft:client:1.15.1). Searched in the following locations: file:/Users/Cody/.gradle/caches/forge_gradle/bundeled_repo/net/minecraft/client/1.15.1/client-1.15.1-extra.jar