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Unable to access Plesk after upgrade: Array and string offset access syntax with curly braces is no longer supported

Ivan Kamnev

Updated April 28, 2023 17:04

kb: technical Plesk Obsidian for Windows

Applicable to:

Plesk Obsidian for Windows

Symptoms

Unable to access Plesk GUI with the error:

PLESK_INFO: Array and string offset access syntax with curly braces is no longer supported (lessc.inc.php:717)
Plesk was recently upgraded to 18.0.50 version.
The Auto-update feature is disabled from Extensions>Updates.

Cause

The version of the Skins and Color Schemes extension is outdated.

Resolution

Log into the server via RDP.
Start a command prompt as an Administrator.
Execute the command below to update the Skins and Color Schemes extension:

C:\> plesk bin extension --install heavy-metal-skin

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