Hi there, kgillies. This null error often signals a temporary browser hiccup when performing tasks in QuickBooks Online. To isolate the issue, let’s perform some troubleshooting steps.
Start by logging in to your account using an incognito window to rule out any cache-related issues. Alternatively, you can switch to other browsers.
If you still can't open the Chart of Accounts, I recommend contacting our Live Support Team so we can further investigate the error.
If you have further questions, feel free to let us know. We’re here to help.