sheet.getProtections no longer works?

Question

I have a script that automatically protects a range of past Dates in my Sheet.

I use the standard sheet.getProtections(SpreadsheetApp.ProtectionType.RANGE);

Answer 1

There seem to be several developers with this problem, it might be a bug or a temporary problem.

The issue has been reported on Public Issue Tracker. Give it a "star" to indicate that you are also affected.