Let's access your account via a private browser to see if it's browser-related or not. Let me guide you how.
On your Google Chrome, press CTRL+SHIFT+N. Then, open your QuickBooks file and go to estimate or invoice.
If it loads successfully, go back to your regular browser and clear your browser's cache. This process will temporarily delete your Internet files and start in a clean slate.
If you're getting the same error, please contact our Customer Care Support so we can create a case for you and investigate further. Here's how you to reach us:
You can also visit our page about income and expenses for some help articles.
Please leave a comment below if you have other questions. I'll be around to help.