Unable to launch citrix applications with ICA data with External Web Interface

We have a custom web portal where in we are consuming netscalar APIs to get ICA data. After getting ICA data if we try to start the session with the below code: var launchData = { "type": "json", value: icaData }; sessionObject.start(launchData);

where icaData will be getting from the Netscalar API but we are not able to launch the app in an iframe and it gives this error called Invalid json value in launchData from CitrixHTML5SDK.js file.

please find below screenshot for error.

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