bekomme folgende Eintraege im log-fiel – was mache ich falsch?

27.08.2017 19:52:22: Fehler beim Laden der config.xml: Specified value was invalid against the facets.
System.Xml.Schema.XmlSchemaValidationException: Specified value was invalid against the facets.
at System.Xml.XmlReaderSettings.OnValidationError (System.Object o, System.Xml.Schema.ValidationEventArgs e) [0x00000] in <filename unknown>:0
at Mono.Xml.Schema.XmlSchemaValidatingReader+<XmlSchemaValidatingReader>c__AnonStorey0.<>m__1 (System.Object o, System.Xml.Schema.ValidationEventArgs e) [0x00000] in <filename unknown>:0
at System.Xml.Schema.XmlSchemaValidator.HandleError (System.Xml.Schema.XmlSchemaValidationException exception, Boolean isWarning) [0x00000] in <filename unknown>:0
at System.Xml.Schema.XmlSchemaValidator.HandleError (System.String message, System.Exception innerException, Boolean isWarning) [0x00000] in <filename unknown>:0
at System.Xml.Schema.XmlSchemaValidator.HandleError (System.String message) [0x00000] in <filename unknown>:0
at System.Xml.Schema.XmlSchemaValidator.ValidateRestrictedSimpleTypeValue (System.Xml.Schema.XmlSchemaSimpleType st, System.Xml.Schema.XmlSchemaDatatype& dt, System.String normalized) [0x00000] in <filename unknown>:0
at System.Xml.Schema.XmlSchemaValidator.AssessAttributeLocallyValid (System.Xml.Schema.XmlSchemaAttribute attr, System.Xml.Schema.XmlSchemaInfo info, System.Xml.Schema.XmlValueGetter getter) [0x00000] in <filename unknown>:0
at System.Xml.Schema.XmlSchemaValidator.AssessAttributeElementLocallyValidType (System.String localName, System.String ns, System.Xml.Schema.XmlValueGetter getter, System.Xml.Schema.XmlSchemaInfo info) [0x00000] in <filename unknown>:0