QB Issue Resolution:

Well, the next time I logged in to the blank account, everything was back to normal. Who knows what was going on.

Resolution for Issue 'Why is ALL of my work from the last 2 years gone after a prompt to resubscribe??' available: Yes (Solved).
Source: Intuit Community forum.

Why is ALL of my work from the last 2 years gone after a prompt to resubscribe??: 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 blank account
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Error Recovery for blank account [Canada]
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