I have been using the same scripts in my Google sheets for a few years and today when a sheet is copied the onOpen function to create a custom menu fails to appear.
If I attempt to run a function manually, I get an error, 'Server error occurred. Please try saving the project again.'
The problem seems to be affecting all of my sheets with custom scripts when copied, the existing sheet function still works fine.
Has anyone experienced this in the past 6 hours? Perhaps it is simply a Google server fault?