Problem with cohort

I want to visualize cohort, but it’s not working. Here is my table and visualization:

I have created already some cohorts in redash and it was ok, but now my datasource is bigquery and I have that problem.
I have checked all data types, they are ok, don’t know what is wrong.

All the column names are lower cased?

No, date was “Date”. I changed it and it works now. Thanks!