Hi,
Based on your execution history, and campaign layout you never tried to add the tag. You set a condition where you checked if a tag is present “Add tag: VitLife Newsletter Lead”, but this is not how you add tags. This is a condition. You need to use an action to add tags: ‘Modify Contact tags’.
I can see, that the contact in question went on the ‘NO’ branch (based on your screenshot the tag wasn’t present). And since you don’t have any action there the campaign fell off the cliff