Technical Questions
Help articles related to Plesk migration, upgrades, databases ant etc.
Other
- PFSI-61276 security fix
- How to subscribe on changes in Plesk Help Center articles / sections
- TTFB for site in Plesk is too high. What can be done to improve it?
- How to disable email notifications about Kaspersky definitions update on a Plesk for Linux server
- Plesk admin hourly receives success emails from KAV update
- Website preview URL is automatically redirected to the main website URL
Plesk Service/Interface
- Unable to open subscription in Plesk after disabling a domain in it via API: Domain Service Web not exists
- Unable to change permissions via Plesk File Manager: Error 500 filemng failed: Unknown error (Error code 2221)
- The number of subscriptions listed in Service plan screen is different from the actual one
- Unable to set default IP address during the initial Plesk configuration on Windows
- The "Restrict Administrative Access" feature does not work.
- Plesk daily maintenance task consume all the RAM on the server
Webserver
- Websites on PHP-FPM are unavailable or loading slowly: "server reached max_children setting" OR "pool seems busy"
- Site works slowly. What can be checked?
- How to secure a Plesk interface with an SSL certificate (Let's Encrypt / other certificate authorities)
- The plesk-php7x-fpm service crashes during the reload after domain name change
- Apache restart shows: AH00543: httpd: bad user name if immutable bit is used
- CVE-2019-0211: Apache HTTP Server privilege escalation from modules' scripts
Applications & Extensions
- wp-toolkit fails to install plugin set: Could not install the set on the WordPress instance
- Let's Encrypt challenge files are not removed from .well-known/acme-challenge/ directories
- "apt update" is not working on Plesk server with Ubuntu or Debian after installing PageSpeed Apache module through Google PageSpeed Insights extension: The repository 'http://dl.google.com/linux/mod-pagespeed/deb stable Release' is not signed
- Unable to order a DigiCert SSL: Missing or Invalid Field: PartnerOrderID
- Cannot select domain to clone WP instance: Something went wrong n is undefined
- Subdomain zones are not synced with Amazon via Amazon Rout 53 extension
Backup, Restore & Migration
- Plesk Migration and Transfer Guide
- Unable to perform a backup to OneDrive: Transport error: Extension transport: ext://one-drive-backup/server/ resulted in a 504 Gateway Timeout
- Cannot download database backup created in Plesk 12.X: 404 Page Not Found
- Restoring a staging WordPress site doesn't restore its database
- Backup restore fails: Unable to decrypt data: Data error (cyclic redundancy check)
- Helm 3 compatibility checker does not work
Databases
- Error when running a query inside PHPMyAdmin in Plesk for Windows Server: unrecognized statement type (near lock)
- Unable to rename table in phpMyAdmin under Domain: Cannot read property 'substring' of undefined
- Websites show garbled characters after Plesk update
- Multiple Vulnerabilities in Oracle MySQL Server before 5.7.25, 5.6.43, 5.5.63: potential Unauthorized access
- Unable to connect to Plesk server via FTP to any account
- 'undefined' is shown next to Database name when installing WordPress on subdomain
Installation & Upgrade
- How to install/remove additional PHP versions provided by Plesk
- Plesk Upgrade Guide
- Plesk update fails: No ODBC MySQL mysql drivers found, trying /usr/lib64/libmyodbc5a.so
- Website shows error after upgrading Plesk to Onyx: 500: Cannot add duplicate collection entry of type 'mimeMap' with unique key attribute
- PrivateTemp folder on a Plesk for Windows server is reset to default upon the upgrade
- Automatic Plesk upgrade to the latest stable version
- Mail address created in Plesk via API request with "No mailbox" status despite failed API response
- DKIM verification fails in sending from Office365: signature verification failed
- Unable to import mail messages if default location of mailboxes was changed
- Roundcube does not save contacts with PHP 7.3
- Customized Dovecot configuration file /etc/dovecot/dovecot.conf is overwritten after Plesk updates
- Mail is not forwarded to destination address if forwarding source mail address has reached mailbox size limit and its mailbox was turned off subsequently
DNS & Statistics
- Statistics calculation does not work in Plesk on Windows: Concurrency syncronization error
- How to use DNS with a Plesk server
- Unable to add a CNAME record: The specific domain name is not valid, you need to specify a valid domain name
- Why is it not possible to install DNSSEC extension for CentOS 6?
- Unable to authorize DigitalOcean DNS extension: client authentication failed due to unknown client
- Awstats stopped to calculate statistics
Website Builder
- Message in Web Presence Builder contact form is disappeared if captcha enabled
- Cannot edit image in the text body in Web Presence Builder
- Web Presence Builder site does not work if document root is specified in Cyrillic
- How to create basic website design with Plesk
- Unable to publish WPB site to Facebook: Facebook has detected that Parallels Presence Builder isn't using a secure connection to transfer information
- Presence Builder icon is shown for domain while Presence Builder is disabled in Service Plan