Hello @quickm
Thank you for reaching out on the community and telling us about your issue. Have you been getting this error since the outage on 4/15 or was it in a different time frame? Generally this error has to do with access to the bank being blocked but I'm not sure if it's a from the server issues in 4/15 againIf you haven't already could you try to reset the account? Right click on your BOA account then select Edit/Delete account . At the top there will be a tab that says online services. Select reset account and it will have you sign into your BOA again.
Once you get a chance let us know how it goes!
Thanks,
Quicken Francisco