Prompt APK installation failed during connection, connection button cannot appear

There are two reasons for this problem:

  1. The installation is not open on the phone to install an unknown source.
  2. Some phones require manual intervention during the installation process. If you do not click install on your phone, you will not be able to complete the installation.

Solution:

  1. Open the phone to allow the installation of unknown sources.
  2. Re-plug the phone, look at the installation prompt pop-up on the phone, and manually click the installation according to the prompt.