• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Issue Cannot upgrade Plesk - incorrect password

Franco

Regular Pleskian
Hello,

I am trying to upgrade from 18.026 to 18.0.27 and at first I had this issue Resolved - Update to Plesk Obsidian 18.0.27 keeps failing, but I could go around it as per suggestion and start the upgrade. However, I then get the following message:

Plesk pre-upgrade checking...
WARNING: [MYSQL ERROR] Given <password> is incorrect. Access denied for user ''@'localhost' (using password: NO)

I was looking for a fix and found this article: Plesk is not accessible: Access denied for user 'username' @'localhost' (using password YES)

However, I cannot run the fix as I don't knwo which user to change the password for (in the message the user is blank).

I am stuck, can somebody help, please?

Regards
 
I had same problem and support pointed me in right direction.

indicates that there is no Client MySQL database server installed on the Plesk server.
As a result, Plesk Installer tries to parse it but fails.

Please check by navigating to Plesk > Tools & Services > Databases.
If only a Microsoft SQL Server is listed and no MySQL servers are present, then this warning can be safely ignored and you can proceed with the update process.
 
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