NoMethodError in Collections#show

Showing /var/www/vhosts/mosquitoticksite.net/httpdocs/app/views/collections/show.html.erb where line #1 raised:

undefined method `id' for nil:NilClass
Extracted source (around line #1):
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<% title 'Collection | ' + @collection.id.to_s %>
<%= link_to('<< Back to All Records', individuals_search_path(:vector => @collection.animal.name.downcase)) %>
<div class="collections show">
<div class="row">

Rails.root: /var/www/vhosts/mosquitoticksite.net/httpdocs

Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"id"=>"30"}

Response

Headers:

None