Domain/subdomain/customer creation in Plesk for Windows fails: A specified logon session does not exist

Gabriel Aznarez

Updated January 13, 2026 18:59

Plesk for Windows

Applicable to:

Creation of a domain/subdomain fails with the following error:

PLESK_ERROR: Error: A specified logon session does not exist. It may already have been terminated. (Exception from HRESULT: 0x80070520)
In Microsoft.Web.Administration module
Exception type: System.Runtime.InteropServices.COMException
at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute()
at Microsoft.Web.Administration.BindingManager.Save()
at Microsoft.Web.Administration.ServerManager.CommitChanges()
at ServerManagerFactory.commit()
at IISServerManager.commit(IISServerManager* )
at Commit common changes(WebServerAdapter::configHosting line 346)
at configHosting(example1.example.com)(WebServerAdapter::configHosting line 493)
at configHosting(example1.example.com)(WebServerManager::configHosting line 2941)
at execute console command --install-vhost(vconsoleapp::start line 93)
at execute "C:\Program Files (x86)\Parallels\Plesk\admin\bin64\websrvmng" --install-vhost "--vhost-config=iahFD2F.tmp"(vconsoleapp::run line 110)
(Error code 1)
The main domain is secured with an SSL certificate in Domains > example.com > Hosting Settings > Certificate.

Incorrectly applied SSL certificate for the main domain.

For all domains:

Connect to the server via RDP;
Open Command Prompt as Administrator and execute the following command:

C:\> plesk repair web -sslcerts

For specific domain:

Log into Plesk.
Go to Domains > example.com > Hosting Settings.
Set Not selected in the Certificate drop-down and click Apply.

Note: An error message similar to the initial one may appear.
Select the necessary certificate in the Certificate drop-down and click OK or Apply.