how to solve it

[#1]

I am a novice, I see the document https://developers.optimizely.com/classic/rest/conditions/index.html, but an error. How to fix it?

[#2]

Tested the above audience and it seems right, maybe there is something else conflicting?

[
"and",
[
"or",
[
"or",
{
"value": "iphone",
"type": "device"
}
]
]
]

[#3]

so I don't know what 's matter

[#4]

Try create a new project inside your dashboard and then create a new experiment with a new audience

[#5]

There is no effect for me ,do you have this problem ,how do you solve? 

[#6]

Hello , I am use ruby optimizely-sdk , I am confused that In Full Stack Version ,we just only use custom attribute define the audience?  And I imitate the guide , how can I set in my code . And other question ,at the bottom of reply , I have activated the experiment , but the variation_key is always nil,  is it because what I set the conditions about audience not satisify our experiment ?