My driver will trip the circuit breaker after about 4 to 5 minutes with a load of clothes. However, it will run through a complete drying cycle without any clothes in it. Heat is OK and no apparent obstructions.
Only thing I can suggest is run a load with low or no heat.
Perhaps it will help troubleshoot whether it is the motor or the heater that is tripping the breaker.
There is always an outside possibility that it is the breaker itself.
If you replace the breaker and it still trips, you might have a motor drawing excessive current under a full load.