If you see the error, " All compiler errors have to be fixed before entering playmode! " on a fresh project without any changes or code, please consider updating to the most recent Unity version.
After all scripts are free of errors, Unity can compile the scripts and enter Play mode.
Compiler errors are generated by a script that has erroneous code.
When you create a script in Unity and click play to test the script is working, you may receive some bright red error text in the collapsed version of the Console located in the bottom left corner of the Unity Editor:
When Unity compiles your scripts, you will receive the following error.
You may experience this error after you paste parts of exiting code into a script, or when you add a new function and the closing curly brace is missing.
Ensuring that the braces (" {", "}") encase the script within the functions and also the functions within the class.
Check the compatible Unity versions for the asset.
The code may be outdated and no longer valid for more recent versions of Unity.
In that case, you must manually fix all errors or download a more recent version of the asset.
If you're opening some of Unity's sample projects, please ensure that you open these in the original Unity version.
