Rails - Feedjira No valid parser for XML

I used Feedjira gem in rails. I want to get some data from URL but I got an error like this:

Feedjira::NoParserAvailable No valid parser for XML.

My code:

url = "https://tickets.companyname.com/activity.atom?key=#{api_key}&user_id=#{user_id}"feed = Feedjira::Feed.fetch_and_parse url // this line i'm getting the error