NoMethodError in CourseSchedulesController#show

undefined method `id' for nil:NilClass

Extracted source (around line #91):
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def check_for_lock(id)
enrollment = Enrollment.where("user_id = ? and course_schedule_id = ?", current_user.id, id).first
if enrollment.blank?
return
end

Rails.root: /var/www/nuvola_academy

Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"id"=>"1091"}

Response

Headers:

None