Horde and Roundcube webmails are missing in Plesk despite the fact they are installed: The webmail component was not installed

Symptoms

• Horde and Roundcube webmails are missing at

  • Tools & Settings > Webmail

    
    
    
    

  • Domains > example.com > Mail Settings:

    
    
     
    

• Both components are installed on the server at Tools & Settings > Upgrades & Updates > Add/Remove Components.

  
  
  
  

• The message "The component was not installed" is shown next the packages psa-horde and roundcube.

• Horde and Roundcube are missing in the Plesk database: When running the following command via SSH, the output does not return anything:

  # plesk db "select * from Webmails;"
  #

Cause

Database inconsistency.

Resolution

1. In Plesk, go to Tools & Settings > Server Components and click Refresh.

2. Check if webmail is available.

If the solution above did not help, reinstall Horde and Roundcube via Plesk Installer:

1. In Plesk, go to Tools & Settings > Updates and Upgrades.

2. On the Updates and Upgrades page, open Add/Remove Components > click Webmail services > select Remove. Click Continue to begin uninstallation.

   
   
   
   

3. Once the uninstallation process is completed, open again Add/Remove Components > select Webmail services for installation and click Continue button.