Google Drive - how to update a file

Hello!
I am building and Agent for my clients ( I am a Mental Coach).
The Idea is to be able to update a file inside a Google Drive with the contents of our sessions.
Is it possible?
Because I keep getting this error:

Troubleshooting ‘Cannot read properties of undefined’ Error

How can I solve it?
Thanks!

Most coaches I have ever had were at least a little bit mental :wink:. Could you edit your post and add a copy of your workflow? Just the error message text is probably not enough context for most people here to be able to help very much.