An error occured

System.NullReferenceException

System.NullReferenceException: Object reference not set to an instance of an object. at FemtenNulOtte.RulesetDatabase.XslHelper.XslHelper.SerializeToXml(Object obj) in C:\Work\Git\sullissivik\src\FemtenNulOtte.RulesetDatabase\XslHelper\XslHelper.cs:line 190