onOpen not executing?

Question

Hi guys im trying to display a sidebar on my google sheets every time it is opened. I am using the onOpen function and calling the html page, but it is not executing. When i run

Answer 1

See if this works

function showSideBar() {
   SpreadsheetApp.getUi()
    .showSidebar(HtmlService.createTemplateFromFile('tipA')
        .evaluate()
        .setTitle('Some title'));
}

and use an installable onOpen trigger on this function. As the previous poster already mentioned, I also don't believe you can show a sidebar (which requires authorization) on a simple onOpen trigger (which doesn't require authorization).