System.NotSupportedException: Unknown language 'mjs', Supported languages: csharp, typescript, dart, java, kotlin, python, swift, vbnet, fsharp at ServiceStack.NativeTypes.LangGeneratorExtensions.GenerateSourceCode(MetadataTypes metadataTypes, MetadataTypesConfig typesConfig, String lang, IRequest req, Action`1 configure) at ServiceStack.NativeTypes.LangGeneratorExtensions.GenerateSourceCode(List`1 metadataTypes, String lang, IRequest req, Action`1 configure) at ServiceStack.Metadata.BaseMetadataHandler.d__12.MoveNext() 
To override the Content-type in your clients, use the HTTP Accept Header, append the .jsv suffix or ?format=jsv
The following are sample HTTP requests and responses. The placeholders shown need to be replaced with actual values.
POST /jsv/reply/GetWorkflowTaskActionUsersAndGroups HTTP/1.1 
Host: doapigw.baasbv.nl 
Accept: text/jsv
Content-Type: text/jsv
Content-Length: length
{
	PageSize: 0,
	PageNumber: 0,
	SearchCriteria: String,
	SelectedUserIDs: 
	[
		0
	],
	SelectedGroupIDs: 
	[
		0
	]
}
HTTP/1.1 200 OK
Content-Type: text/jsv
Content-Length: length
[
	{
		
	}
]