rai fails with "ERRO[0004] Unable to assume role"

[cwpearson]

At PUMPS 2019, we had a student whose macOS client failed with

✱ Checking your authentication credentials.
ERRO[0004] Unable to assume role: SignatureDoesNotMatch: Signature expired: 20190625T125159Z is now earlier than 20190625T133708Z (20190625T135208Z - 15 min.)
 status code: 403, request id: 6c94a705-9750-11e9-8f73-c1f6be7b1816 pkg=amazon
ERRO[0004] Failed to set sts credentials pkg=amazon error="SignatureDoesNotMatch: Signature expired: 20190625T125159Z is now earlier than 20190625T133708Z (20190625T135208Z - 15 min.)\n\tstatus code: 403, request id: 6c94a705-9750-11e9-8f73-c1f6be7b1816”
✱ Preparing your project directory for upload.
✱ Uploading your project directory. This may take a few minutes.
ERRO[0006] Cannot list buckets pkg=store/s3 error="RequestTimeTooSkewed: The difference between the request time and the current time is too large.\n\tstatus code: 403, request id: F039C6AFD8246EA5, host id: dc/Avnr59LWxm2v1qS1/aiH25BuApFPuLINHH6aEBrB95Und2F46Ptd+b+SGbaZzRWOjsPn0uBM=“
ERRO[0006] Can't add file /Users/computa/github_repos/pumps-rai/gpu-algorithms-labs/labs/device_query/CMakeLists.txt to tar: io: read/write on closed pipe
Error: cannot list buckets: RequestTimeTooSkewed: The difference between the request time and the current time is too large.
 status code: 403, request id: F039C6AFD8246EA5, host id: dc/Avnr59LWxm2v1qS1/aiH25BuApFPuLINHH6aEBrB95Und2F46Ptd+b+SGbaZzRWOjsPn0uBM=
cannot list buckets: RequestTimeTooSkewed: The difference between the request time and the current time is too large.
 status code: 403, request id: F039C6AFD8246EA5, host id: dc/Avnr59LWxm2v1qS1/aiH25BuApFPuLINHH6aEBrB95Und2F46Ptd+b+SGbaZzRWOjsPn0uBM=
ERRO[0006] Can't close tar writer: io: read/write on closed pipe
2019/06/25 15:52:02 error: cannot list buckets: RequestTimeTooSkewed: The difference between the request time and the current time is too large.
 status code: 403, request id: F039C6AFD8246EA5, host id: dc/Avnr59LWxm2v1qS1/aiH25BuApFPuLINHH6aEBrB95Und2F46Ptd+b+SGbaZzRWOjsPn0uBM=

[cwpearson]

This ended up being caused by his timezone being set manually to a different time-zone than where PUMPS was hosted, but his clock being set to display the correct local time. Therefore, the system time was off by a few hours, which made the encryption fail.

To correct the issue, his system's timezone and clock were adjusted to be correct.