QB Issue Resolution:

2019 seems to have problems with installation/activation.  See if either of these threads helps.

https://community.intuit.com/questions/1779142-why-can-t-i-activate-my-qb-2019-accountant

https://community.intuit.com/questions/1779087-can-t-open-quickbook-2019-after-successful-install

Resolution for Issue 'Activation locks up QB Enterprise' available: Yes (Solved).
Source: Intuit Community forum.

Activation locks up QB Enterprise: 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 Activation locks
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Error Recovery for Activation locks [Canada]
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