I'm using RadTabStrip with MultiViews inside a RadAjaxPanel in SharePoint which works great until I switch to my custom Master Page.
When clicking a different tab, I get the error 'Unable to get property 'get_linkElement' of undefined or null reference. The page doesn't do an ajax postback either. As soon as I deactivate my custom master page, it works again. I have another page deployed with the same MP with a RadScheduler and a RadAjaxPanel which works perfectly.
What could be wrong with my custom Master Page / RadTabStrip?
Edit: I just noticed, on initial page load, I get this error
SCRIPT5022: Sys.ArgumentUndefinedException: Value cannot be undefined.
Parameter name: type
When clicking a different tab, I get the error 'Unable to get property 'get_linkElement' of undefined or null reference. The page doesn't do an ajax postback either. As soon as I deactivate my custom master page, it works again. I have another page deployed with the same MP with a RadScheduler and a RadAjaxPanel which works perfectly.
What could be wrong with my custom Master Page / RadTabStrip?
Edit: I just noticed, on initial page load, I get this error
SCRIPT5022: Sys.ArgumentUndefinedException: Value cannot be undefined.
Parameter name: type