It's important your bookkeeper is able to create bills so you can get back to doing what you love. QuickBooks is designed to help you streamline your work and I'd like to help make sure you experience this benefit among many others.
First, I'd like for your bookkeeper to start off by troubleshooting this issue to determine if it's a browser-related issue. Clearing cache and cookies is a great way to clean your browser allowing it to work more efficiently. Here's an article that shows you how to do that: How to clear cache and cookies. Otherwise, here's a helpful article that shows you how to: Enter bills and record bill payments in QuickBooks Online. Try this out and let me know what happens. In case this issue persists, I encourage you to contact our support team so they can assist you further with this. Here are our contact details:
Schedule a Callback or start a Chat: click(?) in the upper right in QuickBooks Online > enter "Contact support" > choose Contact Us > provide a brief summary > select Let's Talk > choose Get a callbackor Start a Chat.