Symptoms

Going through the Upgrade/Downgrade screen, submitting all parameters and pressing 'Next', the screen hangs and the following errors are shown in Chrome / Firefox debug consoles:

TypeError: Cannot read property 'aps' of undefined
TypeError: billingResource is undefined

Cause

The billing configuration is not available for the APS.

Any APS 2.0 upsell/downsell capabilities become possible with 2 conditions:

  1. There's Business Automation APS deployed in OA.

  2. The required APS instance has the correct BA settings to communicate with the BA APS.

Resolution

  1. Deploy Business Automation APS, instructions are available here:
    Deployment of APS Billing Application
  2. Provide Bustiness Automation settings for the APS instance.

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