BUG:

GrapesJS version

• I confirm to use the latest version of GrapesJS

What browser are you using?

Chrome Version 97.0.4692.99 (Official Build) (x86_64)

Reproducible demo link

no

Describe the bug

How to reproduce the bug?

1. ...
2. ...

What is the expected behavior? ...

What is the current behavior? get errors when use the iframe in the custom code component

I put this <iframe style="border:none;width:100%;height: 100%;overflow: hidden;" src="https://www.google.com"></iframe> to custom code component and click the "Save" button then I got below error

seems below code issue:

If is necessary to execute some code in order to reproduce the bug, paste it here below:

const rawEditor = GrapesJS.init({
			container: "#editor",
			fromElement: false,
			height: height,
			width: "auto",
			
			panels: { defaults: [] },
			plugins:[pluginCustomCode,pluginBlockBasic],
			pluginsOpts:{
[pluginBlockBasic]: {
				blocks: ["map"],
				category: 'Elements',
			},
},
			canvas: {
				styles: canvasStyles,
				scripts: canvasScripts,
			},
			allowScripts: 1,
     		
		});

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