When I click on a past task to open it says "error opening file null" then it closes. I can still make invoices with it though

[Brandon Brock]

I don't know if I deleted anything or not. I can still see them when I click on tasks and it shows list of all the tasks, it's when I click a individual one to open to read it is when the error comes up. The error messages show on bottom of screen like it's coming from my phone and not the app itself if that makes sense.