Missing script error when i import unity package downloaded from Asset Store

Hi. Im a student studying Unity recently.

When i tried to import the Free Character package from the Asset store, i found that there is issue 'Missing script' in prefabs of the package. I download the correct version of Unity Editor which that Asset supports. I tried 2 Unity Editor versions but both failed to fix that Missing script issue.

I can't find the solution from this forum and the internet also...I thought there is no issue like this if i download Asset from Asset store using correct version of Editor...

Can you guys can expect what is the cause...?