TMPro not referencing (using TMPro;) (Text Mesh Pro)

As the title suggests, my code isn’t catching the TMPro thingy, so Unity and VSC are both saying “TMPro could not be found (are you missing a using directive or an assembly reference?)” and I tried deleting all files of TextMeshPro, removing it and re-installing and re-importing it in, but it still won’t work, I even tried looking for the assembly reference thing in the files, but I looked and looked, but I still couldn’t find the right things for it.