Works for me in v7.5.6:
You need Notepad++ v7.5.5 or later as this was fixed in that release. Also, your text uses non-ascii quotes, I replaced those with plain " instead of “ and ”
An (XML) attribute (like ‘script’) cannot contain multiple values.
Not sure what you mean by this. Once the quotes are replaced, this is perfectly valid XML.
You were close to “a bad workman (who) always blames his tools”.
In this case it was the tool.