Prodeco motor or controller problem

Hi ! my name is Francisco.

I have a Prodecco Phantom ebike components (motor, controller and battery) that I have put them in a new frame (not Prodeco)
It has a 36 V, 500 watts motor, A 36 V, 20 amps controller, and a 36 v, 12 ah battery
When I accelerate, it runs less than 5 seconds and then the motor cut off. With or without charge, accelerating very little or full acceleration.
Also the motor makes a noise, and sometimes, when I accelerate, the motor doesn´t rotate but makes a noise.

Always I have to return the accelerator to 0.

I didn´t change the phase connections, controller and motor aren´t hot, but a long time ago I had a problem that could be related to this: when I accelerated, the bike vibrated and did not move. That problem was short-lived and suddenly disappeared.

I tasted with other battery and the same problem. So, battery is OK.

I don´t have other controller or motor to test.

Please, watch the videos attached.

https://www.youtube.com/watch?v=cTks_FIhfvg
https://www.youtube.com/watch?v=SV6ZIswuiqM

Where is the problem and which is the solution?

Thanks very much for your help :wink:

Regards

Francisco