Ok so I made this custom graphics function for an element I made in TPT, and but keeps crashing TPT

function NaVPgraphics(i,r,g,b)
if tpt.get_property("life",i) > 0 then
return 0,70,255,255,192,0,0,0,0,0
else
return 0,22000,0,128,128,128,0,128,128,128
end
end
elements.property(elements.MYMOD_PT_NAVP,"Graphics",NaVPgraphics)

It runs for a few seconds, then TPT closes down! And on top of that, it doesn't display the way it should.
My reference for graphics functions (such as what the passed parameters and returned parameters are) in LUA is the official TPT wiki page https://powdertoy.co.uk/Wiki/W/Lua.html#tpt.graphics_func

Please help me figure out why it's not working. Is it broken in the latest version of TPT++?