Error showing Post when change category Base

Hi, I’m new to Frontity. When I use my API URL with the default Mars theme, everything works well: recent entries can be seen and when accessed, the content of the note can be seen.

So far so good, the problem is when I want to add my categories, which no longer have the “category” prefix, but I have removed it, for example “category/state” is now only “/state” when I put this in the settings list it does not appear.

Now, if I change the categoryBase to “/”, it works.

But by doing this, I completely lose the function of the single, what could happen, I would greatly appreciate your help.

I would like to be more graphic but the limit of a photo prevents me.

same problem right now, i don’t undestand why, news?