Fatal error: Uncaught Error: Using $this when not in object context in /volume1/web/packages/system/panels/cms/080_users/child.role.actions.php on line 12

Error: Using $this when not in object context in /volume1/web/packages/system/panels/cms/080_users/child.role.actions.php on line 12

Call Stack:
    0.0001     360288   1. {main}() /volume1/web/packages/system/panels/cms/080_users/020_permissions/edit/actions.php:0
    0.0002     360896   2. include('/volume1/web/packages/system/panels/cms/080_users/child.role.actions.php') /volume1/web/packages/system/panels/cms/080_users/020_permissions/edit/actions.php:7