Hi all -
Here's a workaround. It's a REALLY SILLY workaround, but if you have this problem about authentication, here's a simple fix I figured out.
Go to a script that works right now, then select the drop-down and choose "Duplicate" -- once the copy appears, you'll need to click to authenticate and give the script permission to run.
Now you can completely edit (even replace!) the main code and preview/save then schedule.
It makes no sense that I can't just make a new script (that would cause the "failed due to authentication error" message).
Hope this can be duplicated at Google and fixed.
Thanks!
