Troubleshooting

"Preview Failed"

When a render throws, the preview is replaced by a Preview failed button. Click it to render again – the failure is per attempt, and the section keeps working.

The button carries no detail. Open the browser console for the actual error, which is where the plugin logs it – usually the render request failing, because the template raised an error on the unsaved content it was handed.

Sandbox Error in Safari

Safari enforces Content Security Policy (CSP) more strictly than other browsers. By default, Kirby's Panel sends frame-ancestors 'none', which causes Safari to treat the Live Preview iframe as sandboxed. This results in a blocking UI dialog:

Sandbox access violation: Blocked a frame at "https://…" from accessing a cross-origin frame. The frame being accessed is sandboxed and lacks the "allow-same-origin" flag.

To fix this, allow the Panel to be framed by its own origin by adding frameAncestors to your config.php:

return [
    'panel' => [
        'frameAncestors' => true
    ]
];