The first reason may be that you have been disconnected when downloading the installation package, resulting in the omission of the installation package, but generally this problem will show that the analysis failed, and the solution is to download it again.

The second reason is that your mobile phone has run out of storage space, and you need at least 3 G space. The solution is to clean up the cell phone space.

The third reason may be that you have another version of your mobile phone with different signatures, which causes signature conflict, so you can't install it. The solution is to see if there are other versions.