I am getting the following error on an EA Trailhead challenge - when I press check challenge - the error occurs......

There was an unhandled exception. Please reference ID: GMAMOWXH. Error: Faraday::ClientError. Message: 550: Value [{sqrtScale=false, showTitle=true, showAxis=true, referenceLines=[{color=rgb(0, 161, 224), label=Quota $22.5M, value=22500000}, {color=rgb(0, 161, 224), value=0}], title=Total Amount, customDomain={showDomain=false}}] for field [parameters] can't be downgraded to API version 39.0.