Problem about Zoho extension "Channel Integration"

Problem about Zoho extension "Channel Integration"

Hi, I create a new fresh zet project by 
zet init
and after that I've just open Resources.json
and put something like
{
"channel":{
"channelLogoPath" : "/app/img/logo.png",
"acceptAttachments" : false,
"updateRecords" : true,
"contentTypes" : [ "text/plain", "text/html"],
"redirectUrl" : "https:/xxxxxxx",
"includeQuotedMessage": false,
"sync": {
"push": "http://xxxxxxxxxxx",
"pull": "http://xxxxxxxxxxx"
}
}
}

after that, I tried
zet validate

and then I got this error 
PluginManifest file validation :- 

 ==> The property "channelLogoPath" is missing in 'resources.json'.

Please help

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