The issue comes only for perf_bisect related builds.

Can you please provide a link to an affected build?

https://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus6_perf_bisect/builds/2951

I believe the preferred way to access those links is via the logdog urls now.

Unfortunately logdog links too do not work.

https://luci-logdog.appspot.com/v/?s=chrome%2Fbb%2Ftryserver.chromium.perf%2Fandroid_nexus6_perf_bisect%2F2951%2F%2B%2Frecipes%2Fsteps%2FFailure_reason%2F0%2Flogs%2Freason%2F0

This shows blank page with error in right top corner as

.../+/recipes/steps/Failure_reason/0/logs/reason/0	0 ... (Error)


I've logged in with my crendentials (prashant.n@samsung.com). Do I need to get any extra permission?

I don't think perf logs are publicly accessible. Assigning to sullivan for confirmation.

That's correct. We use release official builds for perf, and unfortunately they could contain information from partners that we don't have permission to share outside of Google.