QB Issue Resolution:

know that you’ve been experiencing this issue. This is a known issue and is currently under review. If you would like to be added to our email notification thread, and if you’d like to let our engineers know how this is impacting you, please click here: I’m attempting to download bank transactions from my Union Bank N.A. (CA) Small Business Banking account and I’m getting either error 106 or 101.

Resolution for Issue 'Cannot connect to Union Bank (CA)' available: Yes (Solved).
Source: Intuit Community forum.

Cannot connect to Union Bank (CA): 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 Account
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Error Recovery for Account [Canada]
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