You’re on the right track in going through the necessary troubleshooting steps.

May I know the name of your financial intuition, so I can check if we have an open investigation?​

You’re right that the error 108 means there’s a message on your bank’s website that requires you to take action.  Some examples […]

Resolution for 'Called bank issue: 'Quickbooks error message says we can’t connect to bank because message on the bank website. There’s no message on the bank website. Called bank; verified no message.' available: Yes.

The Called bank 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 Called bank issue yourself by looking for a resolution described in the article. If it is a complex Called bank issue or you are unable to solve the issue, you may contact us by clicking here or by using other Called bank support options.

For more information about resolving issues related to Called bank in Quickbooks/QBO or to get support for the issue 'Quickbooks error message says we can’t connect to bank because message on the bank website. There’s no message on the bank website. Called bank; verified no message.', click the link below: