Can't run Add component

[ViniciusPFaria]

(On Unity 6)
a lot of things are having this problem:
The predefined type System.Object' is defined multiple times. Using definition from mscorlib.dll'
The predefined type System.ValueType' is defined multiple times. Using definition from mscorlib.dll'

[jsjtxietian]

I too have this problem in Unity 2022.3

[eatmelonhan]

me too

[jackwrichards]

@ViniciusPFaria @jsjtxietian @eatmelonhan

I think I have a solution

This is a known issue in Unity 2022.3 and Unity 6, caused by assembly reference conflicts. Here's how to fix it:

1. Quick Fix:

   • Open your project's Packages/manifest.json
   • Add this to your dependencies:

   {
     "dependencies": {
       "com.unity.nuget.newtonsoft-json": "3.2.1"
     }
   }

   • Restart Unity Editor

2. If that doesn't work, try these steps:

   • Go to Edit > Project Settings > Player
   • Under "Other Settings" > "Configuration"
   • Set "Api Compatibility Level" to ".NET Standard 2.0"
   • Set "Scripting Backend" to "IL2CPP"
   • Restart Unity Editor

3. If you're still having issues:

   • Close Unity Editor
   • Delete the Library folder in your project
   • Reopen Unity Editor and let it rebuild

I've also updated the plugin to better handle these version conflicts. The latest version includes fixes specifically for Unity 2022.3 and Unity 6 compatibility.

Let us know if you still experience any issues after trying these solutions!