I have a series of ASPX files which are use RadGrid. One of the ASCX's contains this code:
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<telerik:AjaxUpdatedControl ControlID="RadComboBox_FK_PT_GUID" />
<telerik:AjaxUpdatedControl ControlID="RadComboBox_FK_SOC_GUID" />
I have two web sites running identical code (one test, one production). I part of the "Security advisory" received last month, I downloaded the newer version of the Telerik controls and updated the project, and pushed to Test. No other changes have been made to the code base, just the DLL version for the new controls (2017.6.621.45). Production is still on 2017.1.228.45.
When using this ASPX file with DLL version 2017.2.621.45, I am getting an error "Unknown control type Telerik.Web.UI.RadAjaxManagerProxy" in my try/catch exception block for that page. If I change the project back to 2017.1.228.45 and push to test, it runs fine.
Not sure what has changed to cause this behaviour. Any suggestions on how to work around/correct?