API service workflow error

After upgrading to 2015.11.73 version of Origam there is an error while calling workflow through API service from web site. If I run the same WF in a client, it is just fine.

An error I get when using API service call is:

Internal Server Error: Server nemohl zpracovat požadavek. —> Typ CZ.Advantages.Asap.DA.DatasetTools ze sestavení CZ.Advantages.Asap.DA, Version=2015.11.73.0, Culture=neutral, PublicKeyToken=null nelze načíst.

Please download an updated SOAP API library from http://update.simplicor.com/origam/release/win32/AsapEngineWebAPI_2015_11.zip