Fix MultipleFailureException

✅ Solution

MultipleFailureException in Elasticsearch YAML tests usually indicates that multiple assertions within a single test case have failed, but only the first failure is initially reported. To fix this, ensure that your test framework (likely using `assert` or similar methods) is modified to collect *all* assertion failures instead of stopping at the first one. This usually involves using a custom collector or modifying the assertion logic to aggregate failures for later reporting, providing a complete picture of the errors.