Zenstart: Habit Streak Tracker

I love using this app, but all of sudden I can’t login and I get an error that says Interval server error

It's simple, and pleasing to the eye.

Mainly using this to track t/f categories, and it’s going well! however, I’m attempting to track my skincare routine with the different products I’m supposed to use each night. I am using the category type, but it seems I have to type in the category every time I want to track an event. Unsure if this is working as intended, but once I add a category, I’d love to be able to just select it from a list!