[ Solved ] User does not have sufficient permission for site

My WordPress blog has been zero visitors since the error occurred.
In order to solve this problem, I identified and corrected the problem to solve it.

 

 

I proceeded with the reset at Site Kit.

 

Then, the plug-in was completely deleted.

After downloading, installing, and authenticating the Site Kit, it came out normally.

 

 

Since then, I had to do all the settings.
Ad-sense, Google Analytics, etc.

 

Additional authentication and authority registration were made on the way.

 

All parts come out normally.
And the number of visitors is expected to increase.