Thanks for reaching out to us about this, @JF46,
If you're using the Self-Employed mobile app, I have a couple of suggestions that you can try to get it in working order. Make sure the app is updated to ensure all critical patches are downloaded.
You can also try uninstalling and reinstalling the application to resolve installation corruptions. It will also help reset the application data so it functions properly.
However, if the same thing happens after doing those suggestions, I recommend reporting this to our Support Team. They will create a ticket for this problem and escalate it to our engineers for review. To get our support, check out this link: Contact QuickBooks Self-Employed Support
In the meantime, access your account temporarily on a supported browser.
Let me know how it goes, as I want to make sure this is resolved for you. I'm always here to help. Have a nice day!