Please help! "Unfortunately the Process.com.android.phone Has Stopped"

I just got back from holiday with my girlfriend and wanted to back things up. My note 4 constantly says from boot up "Unfortunately the Process.com.android.phone Has Stopped", then a bunch of other things too. Before I get to do anything, within a minute it restarts itself and continues. I haven't had a chance to back things up yet and desperate need to save them.

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