I am able to login to my WordPress dashboard. Also I can see the tabs on left side such as Posts, Pages, Appearance, Settings etc. But when I click any of those tabs, it only shows me the blank page on the right side.
To solve this issue, you must have access to either FTP or CPanel of your site. Using any one of those, go to this directory wp-admin/includes and find a file with name "screen.php".
1) Open it
2) Go to the line 706.
3) You will find something like this self::$this->
4) Remove self:: from there.
5) Save the file.
You are all done.
Image Credits go to WpMuDev