Unable to make the session state request to the session state server. Please ensure that the ASP.NET State service is started and that the client and server ports are the same. If the server is on a remote machine, please ensure that it accepts remote requests by checking the value of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\AllowRemoteConnection. If the server is on the local machine, and if the before mentioned registry value does not exist or is set to 0, then the state server connection string must use either 'localhost' or '127.0.0.1' as the server name.
Solution:
Start–> Administrative Tools –> Services
Right-click on the ASP.NET State Service and click “start”
Right-click on the ASP.NET State Service and click “start”
or You can set the service to automatic so that it will work after a reboot by click on property.
Vincent Maverick DuranoPosted Aug 17, 2018, 8:51 AM