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Unable to access Plesk: syntax error unexpected '\' (T_NS_SEPARATOR) expecting function (T_FUNCTION) or const (T_CONST)

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Ivan Kamnev
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kb: technical Plesk Obsidian for Linux

Applicable to:

  • Plesk Obsidian for Linux

Symptoms

  • Unable to access Plesk GUI with the following error message:

    CONFIG_TEXT: Server Error
    500 ParseError
    syntax error, unexpected '\' (T_NS_SEPARATOR), expecting function (T_FUNCTION) or const (T_CONST)
    Type ParseError
    Message syntax error, unexpected '\' (T_NS_SEPARATOR), expecting function (T_FUNCTION) or const (T_CONST)
    File Abstract.php
    Line 40

  • The same error is shown in an attempt to access Plesk > Subscriptions or Plesk > Tools & Settings > Application Vault pages.

Cause

Plesk upgrade was performed recently but the services sw-cp-server and sw-engine were not restarted.

Resolution

  1. Log into the server via SSH.

  2. Restart sw-cp-server and sw-engine services with the command:

    # systemctl restart sw-cp-server sw-engine

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