\odif and \pdif flagging as undefined control sequence

[missneutrino]

neither \odif or \pdif are working (and \pdv is, so I know it's not the whole package. I have tried removing other packages to check for clashes but still does not work, but this is my preample:
\documentclass{report}
\usepackage[sorting=none,style=numeric, backend=biber]{biblatex}
\bibliography{Dark Matter 2022}
\usepackage{siunitx}
\usepackage{fullpage}
\usepackage{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage{titlesec}
\usepackage{derivative}

[sjelatex]

Hi, I didn't see your issue before now. I didn't receive a notification, as I was supposed to. The two commands should be defined in the package. It could e that you are using an old version of the package where those commands are not defined. I recommend you to use the latest version. I new version is coming soon, when I have written the documentation.