If you are here then your playermodel has a misconfigured path (not my fault) and you must manually specify the proper path.
You will be using these two commands:
BodyAnim_RegisterPlayermodel (missing model)
BodyAnim_RegisterPlayerhands (missing hands)

If your model is missing:
1. Open the Spawnmenu (Q)
2. Bottom left, open "Browse" (cogwheel)
3. Open "Addons"
4. Find the addon name that has your playermodel and click on it
5. Find the correct model (DO NOT CHOOSE THE RAGDOLL MODEL) and right click on it > Copy to clipboard
6. In the console: BodyAnim_RegisterPlayermodel (copied model)

If your hands are missing, follow the guide above but copy the path of the missing c_hands and use the command:
BodyAnim_RegisterPlayerhands (copied model)

**If this did not work, then the spawnmenu is also returning the wrong path. If you REALLY want to use your playermodel then you will have to find the correct path through other means.**