To check if the browser's cache and cookies are causing this odd behavior, try signing into your QuickBooks Online (QBO) using a private browser (incognito).
Press Ctrl + Shift + N (Google Chrome).
Ctrl + Shift + P (Firefox).
Control + Option + P (Safari).
Once signed in, create an expense again to double-check. If it's successful, return to your default browser and perform a clear cache to refresh the system. However, if the issue persists, try using other supported browsers.
Since the issue persists after following the steps above, I highly suggest contacting our Support team. They have tools such as screen-sharing (remote access) that can pull up your account in a secure environment and check the cause of this odd behavior. They can also perform other troubleshooting steps to fix this for you.
Here's how to reach them:
In QBO, click the Help (question mark) icon at the top right.
Select Contact Us at the bottom to connect with our live support.
For tips and other resources, I recommend visiting our website for reference: Self-help articles.
Please let me know how the call goes or if you have any other concerns. I want to make sure everything is taken care of for you. Have a great day!