New-CosmosDbDocument - PowerShell is returning error "Cannot convert 'System.Collections.ArrayList' to the type 'System.String' required by parameter 'Message'. Specified method is not supported."

[takis-kapas]

Issue

I am getting the CosmosDB noSQL context using a Service Principal that has the "Contributor" role in the CosmosDB account.
I am building a JSON document, based on your instruction in the "New-CosmosDbDocument" module
When I am trying to execute the command "New-CosmosDbDocument -Context $cosmosDbContext -CollectionId $collectionName -DocumentBody $document" I am getting the following error from PowerShell:

$document = @"
{
"id": "$([Guid]::NewGuid().ToString())",
"content": "Some string",
"more": "Some other string"
}
"@

New-CosmosDbDocument -Context $cosmosDbContext -CollectionId $collectionName -DocumentBody $document

Write-Error : Cannot convert 'System.Collections.ArrayList' to the type 'System.String' required by parameter 'Message'. Specified method is not supported.
At line:4 char:17
Write-Error $Error
CategoryInfo : InvalidArgument: (:) [Write-Error], ParameterBindingException
FullyQualifiedErrorId : CannotConvertArgument,Microsoft.PowerShell.Commands.WriteErrorCommand

System Information

• PS Version: 5.1.19041.2364
• Client: PowerShell ISE, VS Code
• OS: Windows 10
• Module Version: CosmosDB 4.7.0