Create Folder not working on REST API

Hello, I'm trying to create a folder in a Program using the POST /rest/asset/v1/folders.json endpoint.
Here is the parameters I'm sending:

{
    name: "InEvent",
    description: "Test",
    parent: {
       id: 1008,
       type: "Program"
    }
}

Here is the response I'm getting:
{
    requestId: "10af3#1802411f082",
    success: false,
    warnings: [ ],
    errors: [{
       code: "611",
       message: "System error"
    }]
}

I'm also getting the exact same error when creating a Static List, here is the requestId: aba7#1802419a646

Any help please?