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我有Carriwave / Cloudinary的问题

因为管理空间我为文章添加了一个图像问题是当我上传它时我有这个错误 .

我在Windows上我使用命令行ubuntu for windows它可以来自那个吗?

这是我的代码

管理员中的post.rb

ActiveAdmin.register Post do
      permit_params :title, :content, :photo



        index do
          selectable_column
          id_column
          column "titre", :title
          column "Contenu", :content
          column "Création", :created_at
          column "Editer", :updated_at
          actions
        end

        form do |f|
          f.inputs do
            f.input :title, required: true, hint: 'Merci d\'ajouter un titre'
            f.input :content, :class => "tinymce", :rows => 40, :cols => 120, required: true
            f.input :photo, required: true, hint: 'Photo obligatoire'
          actions
        end
      end
    end

photo_uploader.rb

class PhotoUploader < CarrierWave::Uploader::Base
    include Cloudinary::CarrierWave

    version :large do
      process resize_to_fill: [350,200]
    end

    version :standard do
        process resize_to_fill: [250,200, :north]
    end

    version :thumb do
        process resize_to_fit: [50,50]
    end

    def store_dir
      "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
    end

    process resize_to_fit: [200, 200]

    def extension_whitelist
      %w(jpg jpeg gif png)
    end

  end

post.rb

has_many :comments

mount_uploader :photo, PhotoUploader

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