#1 by Ziyu

After we create new session for mturk sandbox, the link on mturk says：Not found: Session, {'code': 'qrqxjklm'}

Is there any problem with Heroku or Mturk?

#2 by Daniel_Frey

Did you change the Postgres Database in the meantime?

The standard database needs a few minutes to activate. When you created your session in the old database, it cannot be found in the new database and gives the error.

I had the same problem some time ago.

#3 by Ziyu

Thank you! It helped a lot!