How is Tik Tok Sword Shadow forbidden to be installed?

That's because you don't have permission to open and allow the installation of applications. Below, I will share with you the method of opening permissions to install applications, hoping to help you.

(Demonstration equipment: Glory play4tpro)

The specific steps are as follows:

1. Let's open the settings on the desktop and slide down to find a safe place and then click.

2. Then click More Security Settings.

3. Then click Install External Source Application.

4. search for the application for which you want to open permissions, and then click >

(Take cutting and pasting as an example, as do other apps that open this permission. )

5. Finally, just turn on the switch to the right of the application that is allowed to be installed.