The window open handler response must be an object, but was instead of type 'undefined'.

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I try using webcontents.setWindowOpenHandler in renderer process, and the console prints "The window open handler response must be an object, but was instead of type 'undefined'."
Here is my code:

tab.webcontents.setWindowOpenHandler((details) => {
                this.new(details.url);
                return {
                    action: "deny",
                }
            });

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electron/electron#30017 (comment)