NameError in Spree::Home#index

[bobomimi]

Hi
can you help me with the fowlloing error:

NameError in Spree::Home#index
Showing /home/b/.rvm/gems/ruby-2.6.5/bundler/gems/solidus_slider-6510255aa493/app/views/spree/shared/_slider.html.erb where line #1 raised:

undefined local variable or method `slider' for #<#Class:0x0000556815b5e190:0x000055681542e118>

<% if slider.size > 0 %>

<% slider.each_with_index do |slide, index| %>

<%= link_to image_tag(slide.slide_image.url, alt: slide.slide_caption, class:'img-responsive'), url_for(slide.slide_link) %>