Getting Unhandled promise rejection Issue in testcafe test excecution

Getting following exception while running testcafe test. Unhandled promise rejection:

    { code: 'E52', isTestCafeError: true, callsite: CallsiteRecord { filename:
  '/user/gupta/test.page.js', lineNum: 74, callsiteFrameIdx:
  3, stackFrames: [
  [CallSite],  [CallSite],
  [CallSite],  [CallSite],
  CallSite {}, [CallSite],
  [CallSite],  CallSite {},
  [CallSite],  [CallSite],
  [CallSite],  [CallSite],
  CallSite {}, [CallSite],
  [CallSite],  [CallSite],
  [CallSite]
  ], isV8Frames: true }, apiFnChain: [ 'Selector([function])', '.nth(0)' ], apiFnIndex: 0 }

What does this error mean? I cannot find anything about it.

We're still trying to understand, what the reason for the error is.

How should we handle these promise rejection issue.

P.S. Anything related to concurrency no sure.