NoMethodError in SelectedSuppliersController#index

undefined method `description' for nil:NilClass

Extracted source (around line #7):
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#
@header=params[:product_type].titleize.pluralize
@description=ProductType.where(name:params[:product_type])[0].description
#
@social=SocialLink.where(active:true).order(:order)
@banner=Banner.all[0]

Rails.root: /home/countyfire/website/countyfire.org

Application Trace | Framework Trace | Full Trace
app/controllers/selected_suppliers_controller.rb:7:in `index'

Request

Parameters:

{"product_type"=>"gas %26 propane fireplace insert"}

Response

Headers:

None