QB Issue Resolution:

If you have a PDF printer (Cute PDF or W10 comes with one), just select all the invoices to print, then direct them to this “printer” and it should force you to save one at a time.

Resolution for Issue 'I need to export all of my invoices to PDF files. Preferably each invoice wouild be a separate file with the invoice number as a name.' available: Yes (Solved).
Source: Intuit Community forum.

I need to export all of my invoices to PDF files. Preferably each invoice wouild be a separate file with the invoice number as a name.: 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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