Cannot read property '0' of null

The script seemed to exit, the INFO messages ended, and for-whatever-reason I repeated the script command, which then gave this error:

(node:5559) UnhandledPromiseRejectionWarning: TypeError: Cannot read property '0' of null
at module.exports (/opt/tmp/tracker-archive/tracker-migration/tracker-migration-master/parseUserInfo.js:14:25)
at body (/opt/tmp/tracker-archive/tracker-migration/tracker-migration-master/fetchUserInfo.js:35:16)
at read.then.body (/opt/tmp/tracker-archive/tracker-migration/tracker-migration-master/fetch.js:24:7)
at <anonymous>
(node:5559) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:5559) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.