I am genuinely dying from this: a few months ago, I exported my first game, and tried to make it browser friendly but couldn't, so I installed unity hub, and got unity.4f from that, because apparently you have to get unity  through unity hub to add export modules. Anywho I did this, selected the mac, andriod, IOS, Linux and webgl package and let it reinstall. When I came to export this project, there was no option for WebGL and in Unity Hub it was apparently treating it as a non-unity hub unity version, so I couldn't right click then select "add modules" so i'm basically stuck unless I want to re-reinstall unity :(