QB Issue Resolution:

Have you tried logging in to your Intuit CAMPS account?  All of your license info should be there.

https://camps.intuit.com/app/selfservice/index.html#signin

Resolution for Issue 'License number sent invalid updating 2014 to 2019 purchased 11/23/18 WHAT CAN I DO ?' available: Yes (Solved).
Source: Intuit Community forum.

License number sent invalid updating 2014 to 2019 purchased 11/23/18 WHAT CAN I DO ?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for CAMPS account
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Error Recovery for CAMPS account [Canada]
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