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

Google has (quite) recently restricted the functionality of onOpen triggers. One of the restrains is the impossibility to show a sidebar. There is no real workaround since installable triggers will only work for the user that created the trigger, not for the other users. Instead you will receive a error notification each time someone opens the document. The best solution I found is to create a button that one can use to open the sidebar, this is easier than a menu and obviously more visible. There is a referenced issue on that subject : https://issuetracker.google.com/issues/69238694