I am having problems executing scripts in Google Sheets.

I originally had installed triggers for my functions but I wanted to make copies but the triggers are gone. I set up the installable triggers in G Suite Developer Hub and now I am trying to create triggers in Script Editor of Google Sheets but I am having permission issues.

I know that I can edit auth scope in manifest file but it also didn't work.

```
function onOpen(e){
var ssId = SpreadsheetApp.getActiveSpreadsheet().getId();

ScriptApp.newTrigger('makeDropDownMenu')
    .forSpreadsheet(ssId)
    .onOpen()
    .create();

}

```

Above is the code I want to execute and it says "You do not have permission to call ScriptApp.newTrigger. Required permissions: <https://www.googleapis.com/auth/script.scriptapp>
 at createTimeDrivenTriggers"

What should I do to install triggers in script?