I was using Autocrat on many projects without any issue...
But today I wanted to create new Google Sheet table to create some pdf reports from it with Autocrat.
I opened Google Sheet table with data and then I opened Autocrat, clicked "New Job" to create a new job.

I entered title of this job "Potni nalogi" and clicked "Next":

In next window I wanted to select a template:

Then I clicked button "From drive":

Then instead of Google Drive files, Error window popped up (in my, Slovene language) with "Error message" "API Developer key is not valid".
Whatever I do, I get this same error.
I don't want to open my previous projects because I am afraid something would go wrong and my old projects would stop work.
Does anyone knows what is the reason for this error?
Kindest regards, Maks