Suddenly I get the following error at a lot of instances:
Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
I do not know what causes this error, I get it when:
-I try to edit a page.
-I try to create a new page.
-I try to edit the navigation settings.
Has anyone had this error before in the same setting as I have?
I have searched the internet but they are all speaking of AJAX and ASP.NET while I did not program anything for my SharePoint!
How can this error suddenly occur?
All comments and questions about my question are welcome.
I recently found out that this error only occurs when I acces the web page through a
https://(Alternate Acces Mapping) connection. When using the standard server address, everything works fine.