Game Crashes when a Camera 3D object is assigned to a nonexistent canvas

**EA Version?** What version of the Early Access release was this bug found on? Please note that as per the README the demo version of the game is no longer supported, and bug reports regarding it will be closed. **Info about your device** Windows 11 Home Intel(R) Core(TM) CPU @ 2.50GHz NVIDIA GeForce GTX 1650 Ti 16.0 GB RAM **Describe the bug** A Camera 3D object assigned to a nonexistent canvas crashes the game upon playback. **To Reproduce** Steps to reproduce the behavior: 1. (In editor) Create a Camera 3D object 2. Put in a nonexistent canvas id into the canvas box 3. Play the level in the editor 4. It crashes **Expected behavior** Either nothing or a "You can't do this!" type message **Screenshots** <img width="599" height="388" alt="Image" src="https://github.com/user-attachments/assets/c230dcbe-5b3a-4374-9cd6-f0a68611647d" /> **Additional context** Crash Logs: [crashlog-1780196505.txt](https://github.com/user-attachments/files/28431717/crashlog-1780196505.txt) [crashlog-1780196228.txt](https://github.com/user-attachments/files/28431716/crashlog-1780196228.txt) **By submitting this, I am confirming that I have read the [README](https://github.com/DPS2004/Beatblock-issues/blob/main/README.md) and am using the latest version of Beatblock.**