_ssl.c:510: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed.If you try to build an old branch affected by this, you'll see this error in the logs. To fix it, cherry-pick https://chromium-review.googlesource.com/c/chromiumos/chromite/+/373073 in to your branch. That will resolve the problem. More details in https://bugs.chromium.org/p/chromium/issues/detail?id=839949 .