My Invoice categorie has disappeared, so I can't send invoice?

Hello there, info.

May I know which part of the invoice you mean? Please let me know which part you're referring to that shows categories. I hope you can give me more details or even send me a screenshot so I can properly address your concerns. Anyway, if there's anything else that you need help with, don't hesitate to let us know so we can help you out. Have a nice day!