AjaxControlToolkit Issue with upgrade 14.0.77 to 14.2.7900

[kareem511]

Hi,I am trying to update the sitefinity 14.0.77 to 14.2.7900 getting below error.Not able to resolve the error.
fail: Error occured while upgrading nuget packages. fail -
Error occured while upgrading Progress.Sitefinity. The error was: Unable to find a version of 'AjaxControlToolkit' that is compatible with 'Progress.Sitefinity 14.2.7900 constraint: AjaxControlToolkit (= 3.0.20820)'.Check the C:\Users\HM\Downloads\sf-cli-win-x86\PowerShell\upgrade.log for more details
fail: Upgrade failed
info: Closing Visual Studio instance...
info: Closing Visual Studio instance closed.
info: Closing Visual Studio instance...
info: Closing Visual Studio instance closed.

[RuzmanovDev]

Hi, you can check the nuget package sources in the nuget confg. Make sure that you have http://nuget.sitefinity.com/nuget/ and https://nuget.org/api/v2/. The nuget.sitefinity should be on top (with higher priority)