As per checking, there are no current cases with projects. With this, let's perform a browser troubleshooting, @ELM tree.
However, before we begin, may I ask if your projects are missing when running a Report or if the project is missing in the Projects tab? Any additional information will be highly appreciated.
In the meantime, let's perform a browser troubleshooting to determine if this error is browser-related. QuickBooks encounters errors like this due to accumulated cache.
To begin the process, you can open a private browser, as this ignores historical data. To save you time, use either of these keyboard shortcuts:
- Google Chrome: Ctrl + Shift + N
- Safari 11 or newer: ⌘ + Shift + N
- Mozilla Firefox: Ctrl + Shift + P
- Microsoft Edge: Ctrl + Shift + P
If it works fine, return to your original browser and clear its cache to start fresh. You can also use another supported and up-to-date browser.
If the projects are still missing, I suggest utilizing the Audit log feature to review if other users in your account have accidentally deleted them.
Additionally, you can check out this article to learn how to use projects to track your labour costs and profitability: Project in QuickBooks Online.
I'll be on the lookout for your response or if you have further concerns about your projects. Keep safe.