I have a license for Infragistics WPF whose support ended at the beginning of 2019 (until release 2019.1). I've always used packages from your nuget server. Now the nuget feed is empty? It's correct?
Thank you in advance,
You might have lose the access to nuget packages since your license has expired.
Please contact to sales at Sales@infragistics.com to renew the license or get the back key.