WordPress instance in Plesk is marked as broken: Warning: require_once(): open_basedir restriction in effect

Symptoms

• The WordPress instance is marked as broken in Plesk > WordPress > example.com. The error is

  CONFIG_TEXT: ERR [extension/wp-toolkit] Failed to reset cache for the instance #1, reason:
  Warning: require_once(): open_basedir restriction in effect. File(C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli\vendor\wp-cli\wp-cli\php\boot-fs.php) is not within the allowed path(s): (C:/Inetpub/vhosts/example.com;C:\Windows\Temp) in C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli\wpt-wp-cli.php on line 31
  
  Warning: require_once(C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli\vendor\wp-cli\wp-cli\php\boot-fs.php): Failed to open stream: Operation not permitted in C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli\wpt-wp-cli.php on line 31
  
  Fatal error: Uncaught Error: Failed opening required 'C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli/vendor/wp-cli/wp-cli/php/boot-fs.php' (include_path='.;.\includes;.\pear') in C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli\wpt-wp-cli.php:31
  Stack trace:
  #0 {main}
  thrown in C:\Program Files (x86)\Plesk\Additional\modules\wp-toolkit\wp-cli\wpt-wp-cli.php on line 31

• It's not possible to install Wordpress with the same error.

Cause

Resolution

Workaround

If update is not possible for some reason you may try the following