That error means it's been unable to start JIRA properly for some reason. You'll need to read the logs for more information.
The most likely cause for that particular error is plugin failure though - see https://confluence.atlassian.com/display/JIRAKB/Troubleshooting+JIRA+Startup+Failed+Error
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.