1. Restore the network settings, as follows: (1) Open Safari browser in the settings and select Clear History and Website Data. (2) Click on the top account, select iTunesStore and AppStore, then click on your AppleID, and finally click Exit. (3) Open GM, select Restore, and click Restore Network Settings. (4) Then download the APP again.

2. It may also be the problem of the mobile phone itself, just turn it off and restart it before downloading.

3. It may be the network itself. You can try downloading again in a different network environment.

4. It may be that the mobile version does not support the download of APP. You can upgrade the phone version and try downloading again.