QB Issue Resolution:

have you check out these articles as there are a few reasons on why you would have issue printing an invoice from QBO:

Resolution for Issue 'Does anyone know why Quickbooks is freezing each time I attempt to print an invoice?' available: Yes (Solved).
Source: Intuit Community forum.

Does anyone know why Quickbooks is freezing each time I attempt to print an invoice?: 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 Invoice
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Error Recovery for Invoice [Canada]
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Additional Support Options: