PollyMC cannot install forge, gives this error: Exception caught from launcher java.lang.NoClassDefFoundError: cpw/mods/modlauncher/Launcher at ...

Operating System No response Version of PollyMC Pollymc 8.0 Version of Qt Qt 6.3.0 Description of bug Exception caught from launcher java.lang.RuntimeException: Unable to detect the forge installer ...

Unable to manage or install your mods? Check out our step-by-step guide on how to install and use the Minecraft Forge mod installer.

If you cannot install Java and see Java Installation Not Completed, Unable to install Java, There are errors in the following switches, use these fixes.

To install these mods, you'll need to use a free add-on called Minecraft Forge. This will let you customize Minecraft: Java Edition with mods.