See if this helps.

https://help.quickbooks.intuit.com/en_US/kb/troubleshoot-quickbooks-online-banking-issues-errors-including-ol-olsu-errors/HOW16085

Resolution for 'compass issue: 'I have an error OL-231 when I try to connect to my bank (compass)' available: Yes.

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

For more information about resolving issues related to compass in Quickbooks/QBO or to get support for the issue 'I have an error OL-231 when I try to connect to my bank (compass)', click the link below: