Article ID: 126000, created on Jun 21, 2015, last review on Jun 17, 2016

  • Applies to:
  • Plesk 12.5 for Linux
  • Plesk 12.0 for Linux
  • Plesk 12.0 for Windows
  • Plesk 11.5 for Windows


Cannot log in Plesk as user to mange all my subscriptions:

Error: Authentication failed: invalid username or password specified

and the issue is still persists even after resetting the password for this user:

Websites & Domains > Web Hosting Access > System user


System user is not allowed to log in to Plesk. Customers obtain their system users' access credentials from their service providers and use these credentials for connecting to the server through FTP, SSH, and so on. In addition, all operations with files and directories in Plesk are performed on behalf of system users. For example, when a customer adds a new file in File Manager, the subscription's system user becomes the owner of the file.


Only the following types of accounts are allowed to log in to Plesk:

Search Words


system user

Call to a member function isDefault() on a non-object (Domain.php:966)

Error: Authentication failed: invalid username or password specified

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