The Reason of error for embed code

The Reason of error for embed code

After the upgrade of Zoho last weekend, there is an error for embed code which leads to displaying error of the embed code:

The generated code by Zoho looks like this:
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<iframe height='500px' width='100%' name='zoho-xxx' frameborder='0' scrolling='auto' src='https://creator.zoho.com/xxx/xxx/form-embed/xxx/'></iframe>
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Pls notice, the single quotes ' should be double quotes ". That's why the code will not be displayed in the embeded pages.
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