Wait for condition has timed out error but test doesn't seem to be running

We use Jenkins to run Test Studio tests against our API following publishes and I'm getting the following error:

1/27/2020 11:04:29 AM' - System.TimeoutException: Wait for condition has timed out\r\n   at ArtOfTest.Common.WaitSync.CheckResult(WaitSync wait, String extraExceptionInfo, Object target)\r\n   at ArtOfTest.Common.WaitSync.For[T](Predicate`1 predicate, T target, Boolean invertCondition, Int32 timeout, WaitResultType errorResultType)\r\n   at ArtOfTest.Common.WaitSync.For[T](Predicate`1 predicate, T target, Boolean invertCondition, Int32 timeout)\r\n   at ArtOfTest.WebAii.Core.Manager.WaitForBrowserToConnect(Int32 browserIndexToWaitFor)\r\n   at ArtOfTest.WebAii.Core.Manager.LaunchNewBrowser(BrowserType browserToLaunch, Boolean waitForBrowserToConnect, ProcessWindowStyle windowStyle, String arguments)\r\n   at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.InitializeWeb(ExecutionEngineCreateParams initParams)\r\n   at ArtOfTest.WebAii.Design.Execution.TestExecuteProxy.CreateAndInitializeEngine(Test test, ExecutionEngineCreateParams cp)\r\n   at ArtOfTest.WebAii.Design.Execution.TestExecuteProxy.ExecuteTest(ExecuteTestCommand command)\r\n------------------------------------------------------------\r\n'1/27/2020 11:04:29 AM' - Test completed!\r\n

I don't think the tests are running at all. We have logging on the API and it's not logging any attempts that would have been generated by this process. The API is fine when I access it directly and with our applications. This is happening in multiple environments so it's not confined to one API server. I've tried shutting down and restarting the agent, but that didn't help. How can I go about troubleshooting this further?