the violations.json must contain a testengine and a timestamp clause, it should be formatted as follows: [{ "testEngine":{"name":"axe-core","version":"4.4.2"}, "timestamp": "10/10/2022, 2:20:14 PM", "violations": [] }]

The violations.json file must include specific fields to be valid for use in Quality-time. In particular, the JSON object must contain a testEngine field and a timestamp field, formatted as follows:

[{
  "testEngine": { "name": "axe-core", "version": "4.4.2" },
  "timestamp": "10/10/2022, 2:20:14 PM",
  "violations": []
}]

See also Using the source version metric