You can try the following methods to see if they can solve the problem:

1. Try to close other unnecessary background programs on the phone;

2. Try to clear the memory space of the phone. ;

3. Check whether the correct latest version apk is used

4. Check whether the remaining storage space of the phone is less than 150MB

5. Check the memory capacity of the phone Whether it is less than 350MB

6. Check whether a valid client apk is obtained from the correct URL or QR code