2019 seems to have problems with installation/activation. See if either of these threads helps.
Resolution for 'Activation locks issue: 'Activation locks up QB Enterprise' available: Yes.
The Activation locks 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 Activation locks issue yourself by looking for a resolution described in the article. If it is a complex Activation locks issue or you are unable to solve the issue, you may contact us by clicking here or by using other Activation locks support options.
For more information about resolving issues related to Activation locks in Quickbooks/QBO or to get support for the issue 'Activation locks up QB Enterprise', click the link below: