Hi, I am experiencing this problem where I can't add new files. Whenever I upload a file, I get this error. This happens after I activate my licence after renewal. Please advice.

An error has occurred.

DotNetNuke.Services.Exceptions.PageLoadException: The state information is invalid for this page and might be corrupted. ---> System.Web.HttpException: The state information is invalid for this page and might be corrupted. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 60.51.30.202 Port: 51398 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.0.249.89 Safari/532.5 ViewState: /wEPDwUKMTYwN---> System.Web.HttpException: Invalid viewstate: Missing field: __VIEWSTATE1042. at System.Web.UI.Page.get_RequestViewStateString() --- End of inner exception stack trace --- --- End of inner exception stack trace --- at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) at System.Web.UI.ViewStateException.ThrowViewStateError(Exception inner, String persistedState) at System.Web.UI.Page.get_RequestViewStateString() at System.Web.UI.HiddenFieldPageStatePersister.Load() at System.Web.UI.Page.LoadPageStateFromPersistenceMedium() at System.Web.UI.Page.LoadAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---

 Hi Peter,

This issue is still a problem. Chrome can't upload at all.

Firefox will succeed sometimes, but rarely. I've read up a bit on the Viewstate issue and it is not entire unrelated to module codes.

Can you work with me on this as I really need to get this working.

 Hi,

I've tested with all of them and they do not work most of the time. It's quite random but the chances of it not working is much much higher.

I have switch to aspnetupload instead of Telerik upload and it works without error.

So I would say that Telerik component is causing the problem.