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WebPagetest Forums - Can't start tests

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Full Version: Can't start tests
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Trying to test a page tests run only with Chrome.

At Firefox test fails with an error
Code:
Error starting Firefox: 'module' object has no attribute 'ensure_binary'

At MicrosoftEdge (EdgeHTML) tests fail with
Code:
Error starting browser: Message: Unknown error

Test instances:
  • Dulles, VA - Thinkpad T430 - Firefox - 3GFast
  • Dulles, VA - Thinkpad T430 - Microsoft Edge (EdgeHTML) - 3GFast

What could this mean? I can't really attribute the cause of these errors:
  • is it the tested website which reacts anyhow wrong?
  • Or is it really the test engine, which has problems with this certain website?
Reference URL's