From that little, we can't be specific, as we don't have your code.
But this is pretty simple for you to work out what the problems is: look at the error and double click the message. That will take you to the line that causes the problem.
Look at it code of that line: it will be calling a method, or constructing an object and callign it with one parameter:
MyClass mc = new MyClass("A parameter");
Right click the underlined method name - That will take you to (hopefully) the only overload of that name. Check the number of parameters, and either correct the call, or add a second overload with the correct number of parameters.