AzureSoraSDK.Exceptions.SoraValidationException: 'API version not supported'

[Chikov2]

Getting this error on await client.DownloadVideoAsync(videoUri, "output.mp4");

client is declared as follows: using var client = new SoraClient(endpoint, key, deploymentName);

The other initialization has the same issue:
var options = new SoraClientOptions();
options.Endpoint = endpoint;
options.ApiKey = key;
options.DeploymentName = deploymentName;
options.ApiVersion = "preview";