Open the Minecraft Launcher and in the bottom left, select OptiFine.Once the installation is completed, click OK, and the app will close.In the installer, make sure the Folder matches Minecraft’s location on your computer and click Install.Download the installer from the official OptiFine website and run it.OptiFine also provides the ability to install shaders to your client. You can read more about OptiFine on their website.

Generally, the easiest way to install shaders is with the use of OptiFine, - a mod for Minecraft that optimizes the game to allow faster rendering and provide more FPS. If you are really unlucky, this might be a hardware specific error, meaning that there is no easy fix aside from using a different computer.Note: Shaders are not server-side, and will only affect your client. He has seen more of these weirder kinds of Fabric / Minecraft launcher errors than I have. If all three of these methods don't fix your problem, SuntannedDuck2 from the Fabric community might be able to help you.

Many people in the Forge community (where this error message is more common) have also suggested that updating your Java installation might fix this error. Please make sure that your mods folder only contains Fabric mods and nothing else. In that case, the user had a Forge mod as well as the Fabric installer placed in their mods folder. I could only find one other case of this error happening to a Fabric user. First, please make sure that you are not using Forge, as the Wurst Client requires Fabric instead. This error seems to be more common with Forge installations. Here's what I've found from researching about it: I have never seen this error message before.

Wurst client instal