Error W3C

The plugin works well but generates the following W3C error:

Error: Bad value http://maps.google.com/?output=embed&f=q&q=address,city, country&ll=42.6097408,2.58321&layer=t&hq=LOCALISATION&t=m&z=15& for attribute href on element a: Illegal character in query: not a URL code point.

…..;</script><a↩href=”http://maps.google.com/?output=embed&f=q&q=address, city, …mp;t=m&z=15&” title=”TITLE” class=”google-map-fb-popup5 iframe”>LOCALI……….
Syntax of URL:
Any URL. For example: /hello, #canvas, or http://example.org/. Characters should be represented in NFC and spaces should be escaped as %20.

Thank you for your response

https://wordpress.org/plugins/google-map-with-fancybox-popup/