Airbyte API - Create Connection not working

[shraddhahelical]

I am trying to use Airbyte APIs to automate source to destination sync , I have a on-prem Airbyte Installation

I was able to get these APIs working on my setup - get token, get workspaces, test source connection, create source

I have a destination already setup

I want to use API to create a connection. As per the documentation, if I do not send any "Stream Settings"

All streams will be set to the sync mode: full_refresh_overwrite

I just want to select all streams and the default sync mode

Below is my request body -
{
"name": "CompanyUUID_JobNimbus",
"scheduleType": "cron",
"scheduleData": {
"cron": {
"cronExpression": "0 0 3 * * ?",
"cronTimeZone": "UTC"
}
},
"sourceId": "301e66ed-0a04-4d8b-ba56-7f47cdc78e54",
"destinationId": "50727aa9-c8ff-495d-b954-0ac83b52c378",
"namespaceDefinition": "customformat",
"namespaceFormat": "captain"
}

Connection gets created with schedule set to as expected, also namespace gets set but it shows no streams

If I modify the request as per the documentation page and select a stream, then also it shows no streams
"configurations": {
"streams": [
{
"name": "jobs",
"syncMode": "full_refresh_overwrite"
}
]
}

Also the connections created are not listing on the connections page, I can however, open the connection settings by explicitly appending the connection Id in the browser URL