Sheetworker Example not working

I'm feeling like a bit of an idiot at the moment, so I'd appreciate if someone could explain where I'm going wrong. I am just trying to learn the basics of sheetworkers, so I copied the example script from&nbsp; <a href="https://wiki.roll20.net/Sheetworker_examples_for_Non-programmers" rel="nofollow">https://wiki.roll20.net/Sheetworker_examples_for_Non-programmers</a> I added in the attributes at the bottom of my html, but when I open a character sheet nothing happens to the third box. I'm assuming I've messed something up in the HTML seeing as I just copy-pasted the sheetworker, but I can't think what.

One thing that is probably an issue is that in your html, the hp attribute is "hit_points", but in your sheetworker it is "hitpoints". I haven't tested anything, but that stands out to me as an issue.

thank you that did work. I wrote it like that because in the guide it said that the attribute was written that way. definitely should have thought to try doing that though, thank you