This question has been asked here and I'm posting a new post because I couldn't figure out how to reply to that one. I installed the script and saved it but no date appears in my sheet when I insert new data. I never used scripts before. When I run the script in the script editor I get an error at line 7 where it says:
"var eventRange = event.range;", saying: "TypeError: Cannot read property "range" from undefined".
What am I doing wrong?