Technical Questions
Help articles related to Plesk migration, upgrades, databases ant etc.
Other
- Plesk websites secured by Let's Encrypt certificates show ERR_CERT_AUTHORITY_INVALID warning after September 30, 2021
- How to start a command prompt as an Administrator on Windows Server
- How to diagnose a DoS/DDoS attack and find websites under attack on a Plesk server
- How to customize PHP settings in Plesk
- The rule DHCP Client appeared in the Plesk Firewall, why?
- Plesk and websites are unavailable
Plesk Service/Interface
- MySQL fails to start when a Plesk server lacks disk space: SQLSTATE[HY000] No space left on device 500 Plesk\Exception\Database
- Plesk migration or the "plesk repair web" command fails: PHP Fatal error: Uncaught Error: Class 'GuzzleHttp\Promise\Create' not found in functions.php
- Unable to change the type of an IP address in Plesk for Windows Server: Cannot connect to the task manager (plesk-task-manager service might not be running)
- In Power User View, Plesk File Manager shows contents of last created/switched to webspace by default
- Why has the Domains menu design changed since Plesk Obsidian 18.0.38?
- Unable to connect to Remote Storage using Plesk Backup extensions: Error: Class 'GuzzleHttp\Promise\<ClassName>' not found
Webserver
- How to disable specific ModSecurity rules in Plesk
- Websites on PHP-FPM are unavailable or loading slowly: "server reached max_children setting" OR "pool seems busy"
- Website on Plesk server suddenly started to show 500 error: AH10292: Invalid proxy UDS filename
- Websites on PHP 7.4 and PHP 8.0 are inaccessible on CloudLinux OS: 504 Gateway Time-out
- How to change the maximum attachment size for webmail on the Linux Plesk server?
- plesk repair installation command produces an error: File not found: example.com.conf
Applications & Extensions
- Google Drive Backup extension fails to open in Plesk: Call to undefined function GuzzleHttp\_idn_uri_convert()
- Unable to open "Manage in SpamFilter Panel" in SpamExperts Email Security after Let's Encrypt update to 2.13.5-734 version
- Adding a Git repository in Plesk shows error: Class 'CommonPanel_Validate_IpAddress' not found (GitUrl.php:44)
- Advanced Monitoring shows the following error in Plesk on Ubuntu 18/Debian 9: The tab content cannot be loaded because the Grafana service is stopped
- Plesk WordPress toolkit action log rotate failed on SELinux
- Cannot update WordPress installation from 5.8 to 5.8.1 in Plesk: it completes but still shown as available
Backup, Restore & Migration
- How to switch to the new tokens scheme after Dropbox Backup update?
- Pre-migration warning when migrating from server with custom Apache modules: The following Apache modules are not installed
- Migration from 18.0.36 to 18.0.36 fails with error: backup.tar" failed: No such file or directory (2)
- Where are Plesk backup/restoration logs located?
- Error while performing a subscription re-sync: Failed to execute SQL query: Login failed for user 'sa'
- FTP backup functionality is not working after Plesk upgrade to Obsidian 18.0.33 version: Failed EPSV attempt. Disabling EPSV
Databases
- How to fix InnoDB corruption cases for the MySQL databases on Plesk for Linux?
- Unable to restore the Plesk psa database: ERROR 1813 (HY000) at line 104: Tablespace for table '`psa`.`tablename`' exists. Please DISCARD the tablespace before IMPORT
- Unable to delete MS SQL database in Plesk: User does not have permission to alter database, the database does not exist, or the database is not in a state that allows access checks
- Unable to export MySQL dump for a domain in Plesk: insufficient privileges to SHOW CREATE
- Unable to access Plesk with 500 error message: [2002] No such file or directory
- A PHP-based website fails to open: Failed to connect to MySQL: Access denied for user 'jdoe'@'localhost' (using password: YES)
Installation & Upgrade
- Does Plesk support Debian 11?
- Error during Plesk upgrade to Obsidian 18.0.37: PHP Fatal error: Uncaught JMS\Serializer\Exception\RuntimeException: Could not decode JSON, syntax error - malformed JSON.
- Issues upgrading or after converting CentOS 8 to AlmaLinux: none of the providers can be installed
- Unable to update Plesk on CentOS 7 in Google Cloud platform: repomd.xml signature could not be verified for google-cloud-sdk
- Unable to update Plesk Obsidian 18.0.34 to the latest available build on Ubuntu 16.04: There is no release with ID 'PLESK_18_0_35' of product 'plesk' at the installation source
- sa-compile update fails on Plesk server with Plesk Email Security: dpkg: error processing package sa-compile (--configure)
- Unable to receive or send e-mails in Plesk hosted on AWS/LightSail or Microsoft Azure: port 25 is blocked
- Mail user can't change its own forwarding in Plesk
- Emails can not be received/sent on a Plesk server due to stopped MailEnable SMTP Connector service
- [BUG] After updating to Plesk Obsidian 18.0.37 or 18.0.37 Update 1, email message sent to Plesk email account without mailbox and with forwarding to external mailbox is stuck in mail queue
- Mail client provides warnings regarding IMAP connection for Plesk mailboxes: inotify initialization error
- Unable to change mailbox size for subscription: Unable to set the required resource usage limit because the new value is less than the amount of resources reserved for your customers
DNS & Statistics
- Domains hosted on Plesk server cannot be accessed: DNSPROBE FINISHED ERROR
- Unable to update web-statistics in Plesk: Unable to parse pending domains traffic line
- How to add an MX DNS record with a custom priority for a Plesk domain?
- Mail is received: No valid IP addresses found for sub.example.com
- DNS zone of newly created subdomain is not syncronized with DigitalOcean via extension
- Website hosted in Plesk shows Web Server's Default Page: Domain is resolved to the wrong IP address from the same server.
Website Builder
- How to install Web Presence Builder 17.8.12 Standalone in Plesk for CentOS 8/Debian 10?
- Migration from WPB 12.0 to WPB 17.8.12
- How to enable Web Presence Builder for all websites?
- Web Presence Builder "Text & Images" module is displayed on all website pages instead of being displayed only on the page where the module had been added
- Error while accessing Web Presence Builder: Base table or view not found
- Unable to backup/restore a snapshot for Web Presence Builder in Plesk for Windows: Invalid Snapshot