QB Issue Resolution:

From the chart of accounts edit the account in question, from the online settings tab select “not enabled”, repeat your process for online banking setup.

Resolution for Issue 'Greyed out bank accounts “DirectConnect accounts you want to connect to Quickbooks”' available: Yes (Solved).
Source: Intuit Community forum.

Greyed out bank accounts “DirectConnect accounts you want to connect to Quickbooks”: 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 connect accounts
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Error Recovery for connect accounts [Canada]
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