Fatal error: Uncaught Error: Using $this when not in object context in /volume1/web/packages/system/panels/cms/010_pages/sidebar/main.tpl.php on line 10

Error: Using $this when not in object context in /volume1/web/packages/system/panels/cms/010_pages/sidebar/main.tpl.php on line 10

Call Stack:
    0.0002     360320   1. {main}() /volume1/web/packages/system/panels/cms/010_pages/sidebar/main.tpl.php:0