Whenever I try to add AjaxControlToolkit's HTMLEditorExtender I get following exception:
I didn't find any code block on my page. Except some that I don't think will effect this. Like library importing code and sql datasource tags. Some one suggested me that I need to remove and re-add the library and the tab containing ajax toolkit controls. I done that but then another error came up which I asked yesterday here Error while running the website using AjaxControlToolkit but solution suggested by others didn't worked. So I reset back to original situation. Please tell how to solve this issue? Also please tell why its showing user as "Stephen" in stacktrace's line 3,4,5? I don't have any user of that name.
Try using<%# %>
instead of <%= %>
Might solve your issue.