The wonderful ActiveModel::ForbiddenAttributesError

I've been using strong_params and trying to get a object create to pass. I have two questions.

1. How do you find out which attribute is causing the issue?
2. What am I missing in the code below?

Lets start with the error, the log tells me nothing.

ActiveModel::ForbiddenAttributesError in JobsController#create

Just for giggles, here is the log which I don't see very useful:

Started POST "/jobs" for 127.0.0.1 at 2013-12-17 22:03:59 +0000
Processing by JobsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"Ohq4lVqPVMpjzbZwCfJNYBL78TAcoC0WZLSmpCzMD3k=", "job"=>{"job_title"=>"Junior Rails Developer", "job_description"=>"A new position getig nsomethfins lansnana", "languages"=>["", "Rails", "Ruby"], "country_code"=>"AO", "job_type"=>"Full-Time", "job_salary"=>"30000", "job_level"=>"Junior"}, "commit"=>"Create Job"}
  User Load (0.5ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1
Completed 500 Internal Server Error in 8ms

ActiveModel::ForbiddenAttributesError (ActiveModel::ForbiddenAttributesError):

Makes sense, but then if I look at my create:

def create
    binding.pry
    @job = Job.new(job_params)

    respond_to do |format|
      if @job.save
        format.html { redirect_to @job, notice: 'Job was successfully created.' }
        format.json { render action: 'show', status: :created, location: @job }
      else
        format.html { render action: 'new' }
        format.json { render json: @job.errors, status: :unprocessable_entity }
      end
    end
  end

Strong_params:

 def job_params
      params.require(:job).permit(:job_title, :job_level, :job_description, :job_salary,
                                  :country_code, :job_type, :state, :languages => [])
    end

I am mainly interested in finding how to find out where the problem is for future as it's seems like a needle in haystack error.