Fatal error: Uncaught Error: Using $this when not in object context in /volume1/web/packages/system/panels/cms/030_settings/actions.php on line 11

Error: Using $this when not in object context in /volume1/web/packages/system/panels/cms/030_settings/actions.php on line 11

Call Stack:
    0.0018     365616   1. {main}() /volume1/web/packages/system/panels/cms/030_settings/actions.php:0