Solving: The form cannot be rendered. This may be due to a misconfiguration of the Microsoft SharePoint Server State Service. For more information, contact your server administrator.

To solve this error, you have first to configure the SharePoint State Service using PowerShell as the following:

1. Open SharePoint (SSSE) PowerShell as Administrator.

2. Run the below cmdlet to create a new SharePoint State Service.

    $serviceApp = New-SPStateServiceApplication -Name "State Service Application"
   

3. Again, run the below cmdlet to create the SharePoint State Service Database.

    New-SPStateServiceDatabase -Name "SharePoint_Service_StateDB" -ServiceApplication $serviceApp
   

4. Finally, run the below cmdlet to create a new SharePoint State Service Proxy and attach it with the newly created SharePoint State Service.

    New-SPStateServiceApplicationProxy -Name "State Service Application Proxy" -ServiceApplication $serviceApp -DefaultProxyGroup
   

5. Open SharePoint Central Administration > Application Management > Manage Service Application, Make sure that the SharePoint State Service is listed with its proxy and started properly.

Also here: The form cannot be rendered. This may be due to a misconfiguration of the Microsoft SharePoint Server State Service - deBUG.to