An application error has occurred while processing your request what does this mean in home currency?

The error you encountered happens when a request fails to process correctly. Perhaps you were setting your company's home currency? If so, I recommend opening an incognito window to access the product with a clean slate.

Please note that you cannot change your home currency once you enable Multicurrency in QuickBooks Online. If you need to switch it after activating the feature, you'll want to delete your data and start over.

If you're attempting to accomplish something else, please let us know so we can provide the appropriate resolution.

Keep us posted if you have further questions. I'm always here to help.