Fatal error: Call to undefined method {$CLASS_NAME_HERE}:: in /public_html/ow_plugins/{$PATH_TO_FILE_HERE} on line {$line_number_here}.

• Common cause: Plugin specified in error's path is not compatible with core platform.
• Known to happen when: plugin is updated before core platform.
• Solution: Update core platform.
  • Manual platform update ( recommended)
  • Automatic platform update with manual plugin deactivation ( recommended for experienced web admins only).