Hello Jessica Fonseca,
It seems that you have used the RadCalendar
control in a custom implementation and after the upgrade the application cannot find its assembly because it is integrated in the Telerik.Web.UI.dll
assembly. There are two possible workarounds for this problem:
1. Recreate the custom implementation by having in mind that the RadCalendar
assembly does not exist any more and it is integrated in Telerik.Web.UI.dll
. For more information on using the new RadControls, see the topic RadControls for ASP.Net AJAX
in the Developer Manual.
2. Copy the RadCalendar.Net2.dll assembly in the bin folder of your project.
Hope this helps.
All the best,
the Telerik team