Hello agsmith1610, thanks for reaching out to the Community
We're not aware of any current issues with Handelsbanken connections in QuickBooks Online.
You can check out our online guide for information on bank error messages, troubleshooting tips, and steps to take to resolve issues with the bank account.
If these steps do not fix, please direct your client to contact our support team by phone on 0808 234 5337 or chat (select the Help icon in QuickBooks to access QB Assistant). Thank you. :)