No need to try, all Mecool boxes are banned by Netflix due to the tactics used previously by Mecool to bypass Netflix checks, this ban includes Google Certified boxes like Mecool KM8, KM9 Pro and KM3 which has the Google Widevine Level 1 DRM.
You will still be able to get Netflix 480p from non-certified boxes, including Mecool boxes, through loading some specific versions of Netflix, but I do not think it makes sense to pay for Netflix and get SD quality video.
Ref: Netflix 480p on KM9 Pro and KM3
https://youtu.be/myiH7q7wtvY
BTW, your box is M8S Pro or M8S Pro L? Both are S912 boxes but M8S Pro L got Android TV OS and it was able to run Netflix HD through hacks but later banned by Netflix.
Ref about the ban.
https://forum.freaktab.com/forum/tv...ng-killed-in-some-of-the-chinese-boxes/page54
If you need a Netflix, get a certified box like Mi Box S.