When I use the millet 3 I used in high school to debug Android applications, I always see the situation in the following figure

Because I always know Xiaomi's urination, when I brush my computer, I have to click 8 seconds in the developer's option

So at the beginning, the USB debugging, USB installation and FastBoot are all turned on. However, the above situation still occurs

After searching the nonexistent website, it turns out that it's in the developer's option MIUI optimization Making trouble (ten thousand CNMs are running in my heart)

resolvent

Developer Options > MIUI optimization (off)

Can solve the problem that cannot be installed