InvalidEmail: Email couldn't be validated

[noisy]

https://sentry.io/krzysztof-szumny/steemprojectscom/issues/404926961/

InvalidEmail: Email couldn't be validated
(14 additional frame(s) were not displayed)
...
  File "social_auth_local/middleware.py", line 13, in process_exception
    raise exception
  File "social_django/utils.py", line 49, in wrapper
    return func(request, backend, *args, **kwargs)
  File "social_django/views.py", line 33, in complete
    *args, **kwargs)
  File "social_django/strategy.py", line 107, in authenticate
    return authenticate(*args, **kwargs)

InvalidEmail: Email couldn't be validated