EDIT 1/6/2019: I had completely forgotten this thread existed. The original addon has now been fixed by the creator. So there's really no reason to keep this post up or whatever. Big thank you of course to the original creator to fix the addon and the users in this thread that has provided a temporary fix for everyone. See you guys around I guess.

EDIT 6/28/2018: Some other folks here have made a temporary workaround fix for those who wish to do some manual digging and looking around. Huge credits for Gordon Frohman and SU-33 for providing these instructions.

First, you'll have to have to open the addons folder, it is located at "\GarrysMod\garrysmod\addons\" or something very similar.

Next, download this fixed and unpacked version of the addon from Gordon Frohman: https://drive.google.com/open?id=1-S8Ug6LNyryTYbj53KNXZFc2DkhGoT6p

After that, open the downloaded .zip and extract the "gmod-enhanced-camera-master" folder from inside that .zip into the addons folder you just opened previously. And then, that should be it! Try restarting your game and it should work just fine now. Works perfectly fine for me.

According to what SU-33 has said, if this addon ever gets updated and if you still are subscribed to it, and this addon gets downloaded and update, the unpacked folder you installed manually will still be the one used and not the packed and updated workshop one, so you'll have to delete the unpacked folder you installed manually if you want to use the updated version of this addon. That is, if an update ever releases.

Again, huge thanks to Gordon Frohman and SU-33 for finding a workaround and providing instructions on how to fix it.

ORIGINAL POST: I'm pretty sure the latest Garry's Mod update that was just released not too long ago has completely broke this add-on, because I can no longer see my legs ever since the update.

Gmod Legs 3 also had this problem as well which was fixed rather quickly.