1. expired car membership: car members need to buy it to use the car normally. If the car membership expires, the car will not be used normally.

2. Network problem: Please make sure that the cool dog music player in the car is connected to the Internet. If the network connection is unstable or the signal is not good, it may lead to the inability to play member songs.

3. The version is too low: If you use the old cool dog music player, there may be some compatibility problems, which will make it impossible to play member songs. Please try updating the player version to see if it can solve the problem.