Plesk hosted website shows error: The current identity (ServerName\IWPD_XX(sub_name)) does not have write access to plesk

Symptoms

Unable to access example.com:

CONFIG_TEXT: The current identity (ServerName\IWPD_9(sub_59570495)) does not have write access to plesk

Cause

Incorrect permissions of the website files.

Resolution

1. Log into the server via RDP.
2. Start a command prompt as an Administrator.
3. Fix the permissions:
   

   C:\> plesk repair fs example.com -y