Instantly you are facing “ERROR: Cookies are blocked due to unexpected output”. It showed blank white page on “wp-admin” screen and error message on “wp-login.php” page. For help, please see our below suggestion.
You have a WordPress website that you recently discovered had this error on the login page:
You can only access the login page from wp-login.php, since /wp-admin/ displays a blank white screen.
Login page ERROR: Cookies are blocked due to unexpected output
First you can check a file that showing the issue; yes, I am talking about error log file which is inside your home path directory. By checking error log file will help you understand what is exactly causing the issue and showing white screen on the wp-admin page.
You have check the functions.php file of the theme if that has some extra space at the beginning of the code or end (at the end point)? If yes, remove that, save the file and upload on your server then check.
After refresh wp-admin page from your website it will show your WordPress login page. I think the issue solved “ERROR: Cookies are blocked due to unexpected output”.
Some cases, it can be plugin issue and renaming plugins folder by FTP can solve the issue. But before making any changes by you make sure you have checked the error logs file so that you better know what you are doing. When you know what you are doing for fixing the issue, things will much easier and you will save your valuable time.
If you were able to resolve this issue with some other way, please post the solution in comments and help other users. In case you are still facing this error and need help, you may like to contact with us and we will be happy to help you.