I have created an addon using this guide.
code.gs
function onOpen() { SpreadsheetApp.getUi().createAddonMenu() .addItem('Start', 'showSidebar');}function showSidebar() { const ui = HtmlService.createHtmlOutputFromFile('index').setTitle('Sample'); SpreadsheetApp.getUi().showSidebar(ui);}index.html
<!DOCTYPE html><html><head><base target="_top"></head><body><h1>Works</h1></body></html>It says "If you switch back to document and reload you will see a submenu under Add-ons menu.
But I could not find my addon submenu, I think the quickstart guide is outdated.
Please guide me, How to test the addon on google sheet.