@michaelmior I had the same exact issue. Same as you I had an secure environment variable defined in settings: https://travis-ci.org/hunterlester/safe_browser/jobs/458529411
Once I deleted the env var in my settings then the build went on as usual.
Of course I’m unable to deploy to Github but at least it’s documented now.
I’m able to set a non-secure env var though.
Hopefully Travis team is tracking these threads?