"java.lang.IllegalStateException: The custom attribute store instance already exists."
"Exception in thread "ReportScheduler_QuartzSchedulerThread" java.lang.NoClassDefFoundError: org/quartz/utils/ExceptionHelper"
If that string is found, it may indicate a corruption or mismatch of the Quartz.jar file that is located in two directories:
\Vontu\Protect\lib\jar and \Vontu\Protect\tomcat\webapps\ProtectManager\WEB-INF\lib
Take a copy of the quartz.jar from the 1st path, go into the second path, rename the current quartz.jar and then paste the copied file here. Afterwards, recycle the Vontu Manager service, and then attempt to log into the console.
If this does not resolve the issue, or the VontuManager.log does NOT have the corresponding quartz error, please contact Technical Support for further troubleshooting