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Roundcube in Plesk does not work: Unsupported PHP version. Required PHP >= 5.4 and < 8

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Renan Poss Moreira
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Plesk for Linux kb: technical ABT: Group A

Applicable to:

  • Plesk for Linux

Symptoms

  • Roundcube configured in Plesk shows a blank page, 500 error, or:

    CONFIG_TEXT: Unsupported PHP version. Required PHP >= 5.4 and < 8.0.

  • The following error is shown in Apache logs /var/log/apache2/error.log :

    CONFIG_TEXT: PHP Warning: file_put_contents(/usr/share/errors): failed to open stream: Permission denied in /usr/share/psa-roundcube/program/lib/Roundcube/rcube.php on line 1259
    PHP Warning: Configuration error. Unsupported database driver: in /usr/share/psa-roundcube/program/lib/Roundcube/rcube.php on line 136

Cause

fcgid_module is not enabled in Tools & Settings > Apache Web Server.

Resolution

  1. Log in to Plesk.
  2. Go to Tools & Settings > Apache Web Server and enable fcgid module.
  3. Click OK.

Click on a section to expand

If for any reason the module fails to be enabled proceed as follows:

  1. Connect to the server via SSH.

  2. Edit files etc/apache2/mods-enabled/fcgid.load and /etc/apache2/mods-available/fcgid.load:

    # cat /etc/apache2/mods-enabled/fcgid.load
    LoadModule fcgid_module /usr/lib/apache2/modules/mod_fcgid.so

    # cat /etc/apache2/mods-available/fcgid.load
    LoadModule fcgid_module /usr/lib/apache2/modules/mod_fcgid.so

  3. Restart Apache:

    # service apache2 restart

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