QB Issue Resolution:

We have verified that following the steps in Error 3371 Could not initialize license properties will resolve this issue.

Resolution for Issue 'RESOLVED: Error 3371 or Fatal Error When Opening program' available: Yes (Solved).
Source: Intuit Community forum.

RESOLVED: Error 3371 or Fatal Error When Opening program: 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 Error 3371
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Error Recovery for Error 3371 [Canada]
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