Same problem here, Using Touch Camera PRO 3.1.4, unity 2022.3.5
Actually it does not seem possible to use your asset without the new input system.
Well I manage to get it working by deleting
CustomControlControllerSupportDemo.cs
CameraInputActions
But… It becomes really messy, if I want to use both Touch Camera with Tutorial Manager in same project.
These two assets seem to conflict even with Input system Package (New) configuration
Any clue ? Thanks for your attention.