Build failed with error TS2532: Object is possibly 'undefined'

[irumman]

I am trying to build this plugin from source using

yarn dev

and it is failing. I am using Grafana 7.2

ERROR in grafana/data/plugins/natel-discrete-panel/src/module.ts
  ERROR in grafana/data/plugins/natel-discrete-panel/src/module.ts(596,32):
  TS2532: Object is possibly 'undefined'.
  
  ERROR in grafana/data/plugins/natel-discrete-panel/src/module.ts
  ERROR in grafana/data/plugins/natel-discrete-panel/src/module.ts(601,16):
  TS2532: Object is possibly 'undefined'. 
  
  Trace: Build failed
      at grafana/data/plugins/natel-discrete-panel/node_modules/@grafana/toolkit/src/cli/utils/useSpinner.js:24:29
      at step (grafana/data/plugins/natel-discrete-panel/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:136:27)
      at Object.throw (grafana/data/plugins/natel-discrete-panel/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:117:57)
      at rejected (grafana/data/plugins/natel-discrete-panel/node_modules/@grafana/toolkit/node_modules/tslib/tslib.js:108:69)
      at processTicksAndRejections (internal/process/task_queues.js:97:5)
✖ Build failed