facing "Response for preflight is invalid"

[jkandasa]

I configured this widget to my dashboard and facing "Response for preflight is invalid".

XMLHttpRequest cannot load http://builds.apache.org/api/json?tree=jobs[name,buildable,color,jobs[name,buildable,color,jobs[name,buildable,color,jobs[name,buildable,color,jobs]]]]&pretty. Response for preflight is invalid (redirect)