First time using action fails when `coverage-summary.json` does not exist

[dlaudams]

I am trying to set up this action for the first time and I'm getting errors running the action.

I have created a wiki page for the repo, but I do not yet have a coverage-summary.json file.

Do I need to create this file manually?

Cloning wiki repository...
undefined:1
<?xml version="1.0" encoding="utf-8"?>
^

SyntaxError: Unexpected token < in JSON at position 0
    at JSON.parse (<anonymous>)
    at run (/opt/actions-runner/_work/_actions/greatwizard/coverage-diff-action/v1.0.8/dist/index.js:14309:21)