Save as ai, svg and wmf script error

Can someone help me with fixing the error in script (in red text below)? I'm getting error as in the pic

// Prompt user for file name
var fileName = prompt("Enter file name (without extension):", "Untitled");

// Check if user canceled the prompt
if (fileName === null) {
alert("Saving canceled.");
} else {

// Save as SVG
var svgOptions = new ExportOptionsSVG();
svgOptions.embedRasterImages = true;
svgOptions.cssProperties = SVGCSSPropertyLocation.STYLEELEMENTS;
svgOptions.fontSubsetting = SVGFontSubsetting.None;
svgOptions.preserveEditability = true;

var svgFile = new File("C:\\temp\\" + fileName + ".svg");
app.activeDocument.exportFile(svgFile, ExportType.SVG, svgOptions);

// Save as WMF
var wmfOptions = new ExportOptionsWMF();
wmfOptions.resolution = 300;

var wmfFile = new File(fileName + ".wmf");
app.activeDocument.exportFile(wmfFile, ExportType.WMF, wmfOptions);

// Save as AI
var aiOptions = new IllustratorSaveOptions();
var aiFile = new File("C:\\temp\\" + fileName + ".ai");
app.activeDocument.saveAs(aiFile, aiOptions);

// Alert user that files are saved
alert("Files saved as C:\\temp\\" + fileName + ".svg and C:\\temp\\" + fileName + ".ai");
}