Why can't I download anything in Netflix (see picture)?

Heiii question is above… Have recently Netflix me and can't download anything (see picture). Can anyone tell me what I'm doing wrong?

You have downloads on too many devices, but is UNIQUE to read on your photo!

Is it in there, have already downloaded too much and you should get a higher subscription.

Netflix has already answered your question!

You've already downloaded something on other devices, or share your account with others who have downloaded something down. The number of devices is limited, so you can't download on this device on which you have tried it. Either you remove the other devices or choose a larger subscription where more devices are supported