Unsupported dialect of XML: not RDF or XHTML namespace, etc

Hey everybody!

I started my attempts to upload some exported data from Google + onto my solid pod.

The story is divided in two :slight_smile: and took two different directions, hence my 2 questions. The first one is this:

I made an export is made with Google + exporter. And then pasted the code into a file I created with the same name. And .xml one. It is here: https://teodora.solid.community/googleplus/g_semantic_web_collection-20190104-1of1.xml
But I get this:
Unsupported dialect of XML: not RDF or XHTML namespace, etc. <?xml version=“1.0”?> <rss xmlns:excerpt="http://wordpress.org/export/1.2/excerp: undefined

What is this?