Property with name xxx is not present in connection parameters

[litus2002]

Hi, Building a custom connector, tried to add a Policy for setting the Host Url from a value of the body.

Body contains a structure like this:

{
"inputs": {
"host": {
"connectionName": "xxx",
"operationId": "Sendmsg",
"apiId": "/providers/Microsoft.PowerApps/apis/xxxx"
},
"parameters": {
"body/header/id": "@triggerBody()['text']",
],
"body/data/MyHostUrl": "@triggerBody()['text_2']",

( ... )

},

}
}

I would like to use the value of the pink value body.data.MyHostUrl as a Host Url, but I'm not familiar with expressions.

Tried: (with no success):

@queryParameters('MyHostUrl')
@queryParameters('data.MyHostUrl')
@queryParameters('body().data.MyHostUrl')
@queryParameters('body.data.MyHostUrl')
@queryParameters('@body().data.MyHostUrl')

In this screen:

And I receive all the time an error like this:

    "message": "Property with name body.data.MyHostUrl is not present in connection parameters.",

I feel fustrated

Anybody with expirience building custom connectors could help me sleep again?

Very appreciate

Thank you v/much

[litus2002]

Any idea? 😨I'm very stressed because of this, thank u