When running the transformation script from the docs, it throws me the following error message. Can somebody help?

When running the transformation script from the docs, it throws me the following error message. Can somebody help? 
https://help.keboola.com/tutorial/manipulate/

Also the docs/tutorials are somewhat outdated regarding starting the Sandbox environment etc.

SQL compilation error: syntax error line 2 at position 21 unexpected '"_timestamp"'. syntax error line 2 at position 34 unexpected ','.