We’ve got a private instance of webpagetest on AWS Frankfurt. Since a while all results got a error status of 99996, 99997, 99998 or 99999. Looking at the results they seem to be fine. We test a wide variety of sites.
See for example the following results:
https://www.webpagetest.org/results.php?test=161213_VK_808746d12bdee16f80809566d3589533
https://www.webpagetest.org/results.php?test=161213_06_1afcc0ca4fb69d8931ae44afd862145e
https://www.webpagetest.org/results.php?test=161213_8C_524cc4fff68eb0e03648703cf40f80fa
What could be causing this and how could we fix this?