NoMethodError in SearchesController#collection

undefined method `attributes' for nil:NilClass

Extracted source (around line #105):
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@collection = Collection.where(:identifier_value => search_params[:collection_id]).first
if search_params[:q].blank?
redirect_to persistent_collection_path(@collection.attributes.symbolize_keys)
else
@q = search_params[:q]
@base_href_options = { :q => search_params[:q], :filters => @filters }

Rails.root: /home/app/data_archives

Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"org_unit_code"=>"collection", "collection_id"=>"5762"}

Response

Headers:

None