If you have motio installed, the upgrade overwrites the xml fie containing the customisations.
If not then there is a communication error. The dispatcher cannot communicate with the CM. Can you hit the Content Manager URI? If the CM is started OK, then your crypto keys may be out of sync, since you went to a backup, it will be worth checking. Make sure your CM is started before generating keys on the dispatcher.
Like Denny said, the logs will show more and support should be able to walk you through resolution.
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Luke Peterson
Business Analytics Advocate
IBM
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