Getting a "The OAuth identity of this script is invalid" error in a googleapps-script

Question

There's not much more to be said. I've tried searching for what this means, but can't find it. The script has been running fine for a few months and stopped 12 hours ago with no changes made to it. A manual run shows this error.

Answer 1

I had the same issue and I just clicked Run from the Script Editor and then requested the authorization to run.

Once I authorized the script the error didnt appear anymore.

Answer 2

I was lucky - I just made coffee and when I tried the script again, it worked.