No apple id: If you download from the appstore of your mobile phone or itunes of your computer, you need to enter an apple id to install it, otherwise you can't download and install it. If you don't have an id, please register one first.

2. Unable to download and install through third-party software: If Alipay downloaded from third-party assistant software cannot be installed, it is recommended to download and install it again with the AppStore of mobile phone or itunes store of computer.

2. There are problems with the installation package, such as incomplete or inconsistent signatures. At this time, you can try to download again and install it later.

3. The storage space is full. Cclean, reclaim the storage space, and then try the installation again.