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Handling the error : "The form cannot be displayed because session state is not available."

While developing Sharepoint Workflows, if you may recieve the following error:

"The form cannot be displayed because session state is not available."

To solve this issue, just go to the web.config file of your Sharepoint site and add the following lines under the httpModules section within angular brackets:

add type="System.Web.SessionState.SessionStateModule" name="Session"

If this line is already there as commented then uncomment it and you will not recieve this error again.

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