Hello there, Emmanuel Lacson,
Let's do some troubleshooting steps to get rid of the error. Let's start with using a private browser.
If it works with a private browser, please access your account with the default browser and clear cache. You can also opt to use a different browser.
If the error persists, I recommend contacting our QuickBooks support to isolate the issue.
I appreciate your patience on this. Please let me know if I can provide any other additional support.