I was using a localization Google sheet that has this script. Everything worked fine until I suddenly got this error message:
UiApp has been deprecated. Please use HtmlService Instead.
So I made this fix which seems to have solved the problem. However, now I'm getting this error when I try to run the script:
The webpage at https://n-w3pyp54b6pc7k3oeguedygmafpvez4tf6ltokvy-0lu-script.googleusercontent.com/userCodeAppPanel might be temporarily down or it may have moved permanently to a new web address.
The weird part is that the same script works fine on my co-workers machine. For reference, this is a doc that's on Google Team Drive.
update 1: clearing cache solved the problem temporarily
I contacted google support, and they said I should clear cache. Indeed I cleared cache (by going to dev tools, then right clicking the refresh button and selecting clear cache).. that solved the problem, but today the same problem happened again and clearing cache again made no difference
update 2: same problem happens on safari and firefox:
the error text of FF is
Your connection is not secure
The owner of n-w3pyp54b6pc7k3oeguedygmafpvez4tf6ltokvy-0lu-script.googleusercontent.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
Report errors like this to help Mozilla identify and block malicious sites
on Safari i just get a blank dialogue like so: