Some jobs related to fetching user-data are failing

[SysSn13]

This is the error message shown for the failed jobs:

TypeError: Cannot read property 'split' of undefined
    at fetchUserHelper (/opt/render/project/src/services/users.js:439:54)
    at updateUsers (/opt/render/project/src/services/users.js:464:19)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async Queue.<anonymous> (/opt/render/project/src/services/job-queues/contestPredictionQueue.js:54:21)
TypeError: Cannot read property 'split' of undefined
    at fetchUserHelper (/opt/render/project/src/services/users.js:439:54)
    at updateUsers (/opt/render/project/src/services/users.js:464:19)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async Queue.<anonymous> (/opt/render/project/src/services/job-queues/contestPredictionQueue.js:54:21)
TypeError: Cannot read property 'split' of undefined
    at fetchUserHelper (/opt/render/project/src/services/users.js:439:54)
    at updateUsers (/opt/render/project/src/services/users.js:464:19)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async Queue.<anonymous> (/opt/render/project/src/services/job-queues/contestPredictionQueue.js:54:21)
TypeError: Cannot read property 'split' of undefined
    at fetchUserHelper (/opt/render/project/src/services/users.js:439:54)
    at updateUsers (/opt/render/project/src/services/users.js:464:19)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async Queue.<anonymous> (/opt/render/project/src/services/job-queues/contestPredictionQueue.js:54:21)
TypeError: Cannot read property 'split' of undefined
    at fetchUserHelper (/opt/render/project/src/services/users.js:439:54)
    at updateUsers (/opt/render/project/src/services/users.js:464:19)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async Queue.<anonymous> (/opt/render/project/src/services/job-queues/contestPredictionQueue.js:54:21)