I understand how having trouble accessing invoices in QuickBooks Online (QBO) can impact your workflow, Edith. Let me help you get past this issue.
Currently, there are no ongoing investigations related to your problem.
A cache-related issue is likely causing the inability to create invoices. If this is the case, you can perform some troubleshooting steps. First, use a private or incognito window to rule this out. Here are the shortcut keys:
For Mozilla Firefox browser: Ctrl + Shift + P
For Google Chrome browser: Ctrl + Shift + N
For Safari browser: Command + Shift + N
Next, log in to your QBO account and try to create invoices again. If it works, clear your browser's cache to remove the webpage data causing the issue. If a private browser doesn't work, use other supported browsers.
Moreover, here are some articles that can help you manage your invoices better: