After installing QuickApps, we can no longer browse the SharePoint sites and receive a Correlation ID error. Checking the ID in the ULS logs, the following error is thrown:
"Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the
<configuration>\<system.web>\<httpModules> section in the application configuration. "