TestArchitect Tutorial
Part 4: Getting started with Mobile Web Testing
Lesson #13: Running mobile web testing with BrowserStack 
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Debugging on BrowserStack
To debug the test run on BrowserStack, you can navigate to https://automate.browserstack.com/dashboard/v2/ . This is the recording tool of BrowserStack which can help you debug your test.
Tip:
Each test module will be shown as an individual session. You can filter your session by adding Project, Build & Session Name info into desired capabilities or just use your test start time.