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Applications & Extensions

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Plesk applications and extensions installation/management articles. WordPress, Joomla, Let's Encrypt, CloudFlare and etc.

  • Unable to issue SSL certificate for a domain: error 400
  • WordPress instance can not be removed via Plesk applications catalog
  • All websites on Plesk server periodically unavailable after accessing WordPress comments or working in WordPress dashboard
  • SpamAssassin configured in Plesk shows the messages in log: connect to spamd on ::1 failed, retrying (#1 of 3): Connection refused
  • Can't install plugin via Wordpress Toolkit: destination folder already exists
  • [FIXED BUG] mod_rewrite stopped working. All pages on WordPress sites show 404
  • Unable to install the Plesk Email Security: ERROR: Missing required additional modules: DBD::mysql
  • Unable to issue a Let’s Encrypt certificate: misconfiguration of the Common Challenge Directory
  • Unable to issue the Let's Encrypt certificate when Let's Encrypt extension is in standalone mode
  • How Let's Encrypt extension renews certificates?
  • Advanced Monitoring shows an error: login.OAuthLogin(missing saved state)
  • Unable to configure Plesk Email Security: Conflicting extension installed: SpamExperts Email Security. Please uninstall it first to continue with the installation
  • Plesk mail notification is received: Could not secure domains - Missed domain names failed to pass validation: www.example.com
  • Advanced Monitoring graphs in Plesk are empty after updating Grafana packages to version 7.0.0
  • ModSecurity blocks access to the website: Failed to access DBM file
  • The SpamAssassin service is always stopped when the Plesk Email Security extension is installed
  • Unable to update plugins using Wordpress Toolkit: Failed to reset cache for the instance: An error has occurred when decoding JSON: Decoding failed: Syntax error
  • The custom wp-cron.php task is overwritten every hour in Scheduled Tasks
  • Plesk Email Security displays RDNS as not configured
  • Activating G Suite on a domain with the G Suite Extension in Plesk
  • Notification received by Plesk administrator regarding WordPress site: Failed to reset cache for the instance: filemng: No such file or directory
  • RAM total usage shows wrong value
  • Unable to access Plesk: "The file /opt/psa/admin/htdocs/application.php is part of Plesk distribution. It cannot be run outside of Plesk environment."
  • Blank page of Advanced Monitoring: Grafana: Looks like there's nothing here
  • Unable to reissue the Let's Encrypt SSL certificate in Plesk: DNS problem SERVFAIL looking up TXT
  • Plesk Administrator receives hourly email messages: dgri-report API call failed: HTTP Error 500: Internal Server Error
  • WordPress can not be installed via WordPress Toolkit in Plesk: Specified column "guid" is not in the row
  • Unable to install WordPress: Element 'db-server-id': 'null' is not a valid value of the atomic type 'id_type'.
  • WordPress Toolkit produces error messages each hour: Request failed with status code 400
  • Unable to cancel a Let's Encrypt order on SSLIt! in Plesk: Integrity constraint violation: 19 NOT NULL constraint failed: OrderAttribute.value
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