Cannot edit some attributes in character sheet

Created a new character, NewLad, and cannot seem to edit some attributes on the sheet, such as max HP, level, BAB, etc. Clicking the numbers doesn't seem to do anything at all. I can't seem to see any errors in the console beyond which I don't think is relevant.

In case my sheet doesn't look right or is missing something, here's an image:

And here is the actor data: fvtt-Actor-New_Lad.json