What should I do if the upgraded phpmyadmin cannot be opened?

What should I do if the upgraded phpmyadmin cannot be opened?

After upgrading to the latest phpMyAdmin version, the login box is blank and the solution is to be unable to log in.

We need to open and find: phpMyAdmin\ libraries\plugins\auth\AuthenticationCookie.class.php

Open AuthenticationCookie.class.php and delete the two hide

The screenshot after deletion is as follows and saved.

Refresh. The login box appears.

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