Missing (Mono Script) when it really exists

I’m running into a very annoying issue. Come on Unity! I thought you were better than this. When there is a bug in a script, the script shows up as missing in the inspector. I just upgraded an old project from when JavaScript was still allowed for monobehaviours. The problem is that the inspector isn’t telling me what the bad script is (and what the property values were). I’ve been creating CS versions of some of the old JS files and if I take a wild guess at which script it was and I set it to the new script, the old property values magically appear in the inspector. I don’t want to keep guessing like this. Is there any way to get Unity to tell me what the broken script names are??

It sounds like there may be an issue with the meta data files associated with your scripts. The meta files are used by Unity to store information about the scripts, including their GUIDs (Globally Unique Identifiers), so that the editor can properly link scripts to their components in the scene.

If the meta file for a script becomes corrupted or out of sync with the script itself, Unity may have trouble locating the script and display it as “Missing” in the inspector. This can happen if you manually modify the script file outside of Unity or if you’re working in a version control system and there are conflicts with the meta files.

To fix this issue, you can try regenerating the meta files for your scripts. Here’s how to do it:

-Make a backup copy of your project before making any changes.
-Close Unity.
-Go to the project folder in your file explorer and delete the Library and Temp folders.
-Open Unity again and let it regenerate the Library and Temp folders.
-Open your project and wait for Unity to finish importing all assets.
-If the “Missing” scripts are still not appearing correctly in the inspector, try reimporting the scripts individually by right-clicking on each script file in the project window and selecting “Reimport”.
If this doesn’t work, there are a few other things you can try:

-If you’re working with version control, try checking out the project to a fresh directory and see if the issue persists.
-If you have any third-party plugins or assets that might be causing the issue, try disabling them temporarily to see if it resolves the issue.
-If all else fails, you can try creating a new project and copying your assets and scripts over to the new project. This can be a time-consuming process, but it may be necessary if the issue is persistent and affecting your ability to work on the project.