Registration attempt ends with 'Oops, something went wrong'

[meritumenterprises-netizen]

Registration attempt ends with 'Oops, something went wrong' message.

To Reproduce Steps to reproduce the behavior:

1. Click Register
2. Fill out all the fields, including Pokemon (I used Pikachu)
3. Click Register
4. See error in the top right corner.

Expected behavior

I should be able to register myself.

[meritumenterprises-netizen]

Here is output from the backend (which is running in Docker from the backend project)