Cannot redirect to nil!
Extracted source (around line #135):
133
134
135
136
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138
              
end
session[:spoken_lang] = lang
redirect_to request.referer
end
# Updates the student's last_lesson_completed field.

Rails.root: /app

Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"lang"=>"cantonese"}

Response

Headers:

None