Not sure why it was removed, but here's a link to the last PR from 2016 <a href="https://github.com/Roll20/roll20-api-scripts/pull/467/files#diff-debc4f7bd2e19fd26ee23b6487f2a27111864dc235a76baac649a5a8ba46d86b" rel="nofollow">https://github.com/Roll20/roll20-api-scripts/pull/467/files#diff-debc4f7bd2e19fd26ee23b6487f2a27111864dc235a76baac649a5a8ba46d86b</a> Follow-up/Update: This topic might be better suited for the Mods (API Scripts) forum? it looks like CthulhuTechDice as well as some other mods were removed in 2019...? <a href="https://github.com/Roll20/roll20-api-scripts/commit/9a3bb3544eda8008244e211f963ee10a9f651c8e" rel="nofollow">https://github.com/Roll20/roll20-api-scripts/commit/9a3bb3544eda8008244e211f963ee10a9f651c8e</a> While some of these mods were re-added/updated, some were not. ie CthulhuTechDice was not. I have no idea why. It's highly possible that there were some changes made to Roll20 at the time that required some additional changes to API mods to be compatible. Not sure. Keep that in mind if you install CthulhuTechDice as a custom mod. YMMV Perhaps The Aaron can comment? CthulhuTechDice is one of his awesome creations. Hope this helps.