I'll leave you with this picture

Did you install Cloth API, then it would work, use the CurseForge app for modding installation if you don't understand what you are doing.

Note to user who stumble across this like I did: It requires Cloth API Specifically - not cloth config, which is on modrinth. At the time of this post (july 2022) Cloth API can only be found on curseforge. Link: https://www.curseforge.com/minecraft/mc-mods/cloth-api