Blogger Template Error Message: "The entity name must immediately follow the '&' in the entity reference"

It means we need to escape the & character with &

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Example

I took a snapshot of an error ⬇️

Replace the character & with & ⬇️

That solves the error. ✅

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We can use CDATA section too. With that, we don't need to escape the forbidden characters on the XML. This is an explanation of using CDATA section on Blogger.

And this is a tool on Port Raptor to encode (escape) and decode the forbidden characters.