Visual Studio 2022 - ASP.net - Error Creating Control ajax Toolkit ... Page Design-CodePudding

I have a Visual Studio 2022 ASP.net application that now displays "Error Creating Control ajax Toolkit" when viewing the Page Design:-

The application references the AjaxControlToolKit:-

And the path is pointing to the Ajax install path:-

The application builds and runs but when viewing the design page I get the "Error Creating Control" messages.

This seems to have started very recently.

Any ideas why?

tia

CodePudding user response：

Just to add to my original question It appears that the "Web Live Preview" was the issue.

I set the option back to "Legacy Web Forms Designer" and it seems ok.

I found this similar post