White Screen: Ember app breaks when backend data is missing

[sbor23]

If a plain without employments etc. is logged in, the ember app goes rogue and even trashes the browser because of some crash loop.

Console log:

Uncaught TypeError: Cannot read property 'asHours' of undefined
    at e.<anonymous> (timed-7ff7d5d69c5764c6c2caeaa2fed4eebd.js:1)
    at Vt.get (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at ze (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at vt.compute (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at vt.value (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at Bt.value (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at ge (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at Tr.create (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at Object.evaluate (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)
    at se.evaluate (vendor-822ba7d971faf83fe4b4319d08e9a4d9.js:1)