Bluperman949

Ok. Sorry for wasting your time if you came here to help. The issue was something gradle-related. I hadn't added a Gradle Nature to my project in eclipse so it just didn't work properly. If you're having this issue on eclipse, try right-clicking your project, clicking "add gradle nature", and then building it again. I'll mark this as solved now.

I'm new here, so forgive me if I'm making a stupid mistake. I've been trying for the last two days or so to set up a modding environment with JEI API and the JEI mod itself in it. Here are the relevant pieces of my build.gradle: dependencies { minecraft 'net.minecraftforge:forge:1.16.5-36.0.1' compileOnly fg.deobf("mezz.jei:jei-7.6.1.65:1.16.4:api") { transitive = false } runtimeOnly fg.deobf("mezz.jei:jei-7.6.1.65:1.16.4") { transitive = false } } repositories { maven { // location of the maven that hosts JEI files name = "Progwml6 maven" url = "https://dvs1.progwml6.com/files/maven/" } maven { // location of a maven mirror for JEI files, as a fallback name = "ModMaven" url = "https://modmaven.k-4u.nl" } } I'm honestly not sure what the "transitive = false" bit does, but it made the API download properly. The problem is, the mod itself (not the API) isn't being downloaded when I build my project. Or at least that's what I think is happening. I might be wrong. Anyways, here's the error. It doesn't prevent the client or server from running, it just shows up as a problem and JEI isn't listed as a mod in the client's home screen's "mods" menu. This error used to appear twice, once for each missing library, but one of them is fine now that I added that "transitive = false" bit of text and built my project again. Given that I don't see JEI when I run the client, I'm guessing it's the API that downloaded properly and the mod that's missing. When I say "built my project" I mean that I ran "gradlew eclipse" and "gradlew genEclipseRuns" from cmd with the working directory set in my mod's workspace. EDIT: I just found this at the end of the output for gradlew eclipse. So yes, it's not able to download this file. Is there anything I'm doing wrong? If I left out any important information please let me know. Thanks!