Greenify (autostart) topic

Can anyone please tell me what is the ''dropzone'' ? what is it used for ?
I installed xposed and greenify but when i open greenify this image is shown (as below)
How can i solv it ? I have already the greenify to start up and as ''protected'' app ....I really dont understand what is blocking it ?

Do your huawei has a greenify like option by defoult ? If yes how and when ? Thank you so muchhhhhhhhh

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