The procedure DNN_UpdateServer has a exception if the server is not in DNN_WebServers. Found in DNN 4.9.2.
To fix this issue catch the exception:

CREATE OR REPLACE PROCEDURE DNNxx.DNN_UpdateServer
(
 p_ServerName IN VARCHAR2,
 p_CreatedDate IN DATE,
 p_LastActivityDate IN DATE
 
)
is
 l_ServerID NUMBER(11);
 l_Count NUMBER(11);
begin
 select COUNT(*) into l_Count from DNN_WebServers;
 If l_Count = 0 Then
  l_ServerID := 0;
 Else
        BEGIN
      select NVL(ServerID, 0) into l_ServerID from DNN_WebServers where UPPER(ServerName) = UPPER(p_ServerName);
        EXCEPTION WHEN NO_DATA_FOUND THEN l_ServerID := 0;
        END;
        
 End If;
 IF l_ServerID = 0 Then
  INSERT INTO DNN_WebServers
  (
   ServerName,
   CreatedDate,
   LastActivityDate
  )
  VALUES
  (
   p_ServerName,
   p_CreatedDate,
   p_LastActivityDate
  );
 Else
  Update DNN_WebServers
  SET
   LastActivityDate = p_LastActivityDate
  Where ServerID = l_ServerID;
 End If;
end;