This is a testharness.js-based test.
Harness Error. harness_status.status = 1 , harness_status.message = Traceback (most recent call last):\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\wptrunner\\wptrunner\\executors\\base.py", line 322, in run_test\n    result = self.do_test(test)\n             ^^^^^^^^^^^^^^^^^^\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\wptrunner\\wptrunner\\executors\\executorwebdriver.py", line 1051, in do_test\n    self.extra_timeout).run()\n                        ^^^^^\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\wptrunner\\wptrunner\\executors\\base.py", line 200, in run\n    err = setup_fn()\n          ^^^^^^^^^^\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\wptrunner\\wptrunner\\executors\\executorwebdriver.py", line 860, in set_timeout\n    self.protocol.base.set_timeout(self.timeout + self.extra_timeout)\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\wptrunner\\wptrunner\\executors\\executorwebdriver.py", line 81, in set_timeout\n    self.webdriver.timeouts.script = timeout\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\webdriver\\webdriver\\client.py", line 52, in script\n    return self._set("script", secs)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\webdriver\\webdriver\\client.py", line 43, in _set\n    self.session.send_session_command("POST", "timeouts", body)\n  File "C:\\b\\s\\w\\ir\\third_party\\wpt_tools\\wpt\\tools\\webdriver\\webdriver\\client.py", line 588, in send_session_command\n    raise TypeError("Session.session_id must be a str to send a session command")\nTypeError: Session.session_id must be a str to send a session command\n
Harness: the test ran to completion.