When you boot up a world, /cam-server works completely fine. However, if you were to run /reload, you will find that to no longer be the case.
Version: 1.19.2, may affect others.
Forge Version: Any

How to reproduce:
Step 1: Load up any world file.
Step 2: Type in /cam-server to verify it works.

Step 3: Run /reload

Step 4: Attempt to run /cam-server again. It will no longer work.

Note: This was done on a completely new client with nothing except CMDCam and CreativeCore installed on the latest version of Forge for 1.19.2,

Sorry but I do not support 1.19.2 anymore. I'm pretty sure this issue got fixed in newer version. If you can update to 1.20.1, otherwise you will have to live with it.