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[Kolenmi]

Hello, when I try to upload image, I get following message

There is log file... ActionView::Template::Error (undefined method `thumbnail_path' for #<#Class:0x00007fb406143d10:0x00007fb4055abd68> Did you mean? thumbnail_tag

thumbnail_url):
1: <h1><%= l(:label_new_article) %>: <%= link_to(h(@article.title), @article_url) %>
2: (<%=h @article.category.title %>)</h1>
3: 
4: <% if thumb = get_article_thumbnail_url_absolute( @article ) %>
5:   <p><img src="<%= thumb %>" alt="[Thumbnail]"></p>
6: <% end %>

Thank you