SeqRequestLogsFeature does not work with ServiceStack v5.9

[labilbe]

An error is thrown on AppHost.Init().
Error message is Method 'get_IgnoreFilter' in type 'ServiceStack.Seq.RequestLogsFeature.SeqRequestLogger' from assembly 'ServiceStack.Seq.RequestLogsFeature, Version=5.1.0.104, Culture=neutral, PublicKeyToken=null' does not have an implementation..

Responsible line is define in AppHost.Configure() at this line.

if (AppSettings.Get("SeqEnabled", false))
    plugins.Add(new SeqRequestLogsFeature { SeqUrl = AppSettings.GetString("SeqUrl") });

If I ignore this line, no error is thrown.

Thank you for your time!