When you add statements using the Script Editor tools, ensure you add periods where they are needed to separate the statements.
Also be sure to fill in the template completely.
When locating scripts, remember that a category must be selected before any scripts are listed.
Also be sure to select the proper category that contains the script.
When you are creating new scripts, be sure that the public push button is toggled correctly to create public methods.
When you are creating new scripts, be sure that the instance push button is toggled correctly to create instance methods.