I want to run spark. What do I need to do?

[hansen-jun]

I want to run spark. What do I need to do?
And When I log in to the management console, I often get 502 errors that I can't access and can't enter. I'm sure my account password is okay, but he shows that the password is wrong and can't enter. In addition, I deployed it with docker.

[ZahirGong]

Maybe the JWT_SECRET makes this problem. It means that you should add any string such as JWT_SECRET: ${JWT_SECRET:-DeviceHive}, not the Access JWT or Refresh JWT on Playground page. Then run docker-composr up to update you containers or images. Hope it will be helpful.