Meteor Client exclusively supports Fabric. You cannot run this .jar file on Forge or Vanilla Minecraft without Fabric installed.
There are several benefits to using the Meteor Client Mod for Fabric 1.21. Some of the key benefits include: File name- Meteor-Client-Mod-Fabric-1.21.jar
Conflicting mods (e.g., OptiFine or Sodium with specific settings). Fix: Remove all other mods temporarily. Add them back one by one. Cause 2: Corrupted Meteor JAR. Fix: Re-download from official source and verify checksum. Meteor Client exclusively supports Fabric
Once you have the file installed, here is how to get the most out of it. File name- Meteor-Client-Mod-Fabric-1.21.jar