Forge+LiteLoader
Hello, Liteloader and Forge are not compatible on 1.12.2 and others versions.
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ForgeOptiFine(client) + LiteLoader(mod) https://pastebin.com/eHYXfgPW LiteLoader(client) + Forge(mod) https://pastebin.com/ZmLgDzqU
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I have Optifine, Liteloader, and Forge all installed on one instance. Proof - https://i.imgur.com/kQSO7ZO.png
If I remember right, you install Forge, then move LiteLoader and Optifine .jar files to the mods folder for Forge... it then will run all 3 on load. Here are the instructions given - https://www.liteloader.com/explore/docs/user:install:forge