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Knowledge Base

Plesk is unable to install or update WordPress instances with WordPress Toolkit: Db::makeUniqueDbName() must be of the type int, null given

 
applications extensionsdatabasedatabase servergohosting

Symptoms

  • Installing WordPress on a domain fails with the following message:

    Your hosting package does not provide for the creation of additional databases. This WordPress installation uses an existing database instead of a new one.

  • Errors like the following can be found in /var/log/plesk/panel.log:

    [2023-01-01 01:23:45.678] ERR [panel] Task failed: id=12345, pid=9480, type=ext-wp-toolkit-smart-update-instance, error=Argument 1 passed to PleskExtWpToolkitHelperDb::makeUniqueDbName() must be of the type int, null given, called in /opt/psa/admin/plib/modules/wp-toolkit/library/Servers/DomainDatabaseManager/PleskDomainDatabaseManager.php on line 76
    [2023-01-01 12:34:56.789] ERR [extension/wp-toolkit] external Server Error: Argument 1 passed to PleskExtWpToolkitHelperDb::makeUniqueDbName() must be of the type int, null given, called in /opt/psa/admin/plib/modules/wp-toolkit/library/Helper/Install/PleskInstallTargetDatabase.php on line 144

  • There are multiple MySQL instances in Tools & Settings > Database servers

Cause

WordPress Toolkit bug with ID EXTWPTOOLK-10137

Resolution

Workaround: Set a default database server for the Service Plan

  1. Log into Plesk
  2. Go to Service Plans > Service Plan Name > Hosting Parameters > Default Database Server
  3. Select a server from the dropdown
  4. Press Update & Sync
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