Ruby on Rails : Paperclip::AdapterRegistry::NoHandlerError in UsersController#update - ruby

Question

What am I doing wrong?
Paperclip::AdapterRegistry::NoHandlerError in UsersController#update
No handler found for "S__28434447.jpg"
#user = User.find(params[:id])
if #user.update(user_params)
flash[:notice] = "edit success"
redirect_to("/users/#{#user.id}")
end
users_controller.rb
class UsersController < ApplicationController
before_action :authenticate_user
def edit
#user = User.find_by(id: params[:id])
end
def update
#user = User.find(params[:id])
if #user.update(user_params)
flash[:notice] = "edit success"
redirect_to("/users/#{#user.id}")
end
end
private
def user_params
params.require(:user).permit(:avatar, :name, :email, :phone_number, :description)
end
end
Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"hRL4l1uZtBP8N9uQZeImLSOyn/u10Qc7zXiJBkFvVJvzO7bS6DxGVpIozEu0fjWRAZU1YGsfMgj6bwNT1P1FFg==",
"user"=>{"name"=>"admin", "avatar"=>"S__28434447.jpg", "email"=>"admin#gmail.com", "phone_number"=>"", "description"=>""},
"id"=>"1"}
edit.html.erb
<%= form_tag("/users/#{#user.id}/update", html:{multipart: true}) do %>
<div class="form-group">
<p>*ユーザー名</p>
<input name="user[name]" value="<%= #user.name %>" class="form-control">
</div>
<div class="form-group">
<p>プロフィール画像</p>
<input name=user[avatar] type="file" value="<%= #user.avatar %>" class="form-control">
</div>
<div class="form-group">
<p>*メールアドレス</p>
<input name=user[email] value="<%= #user.email %>" class="form-control">
</div>
<div class="form-group">
<p>電話番号</p>
<input name=user[phone_number] value="<%= #user.phone_number %>" class="form-control">
</div>
<div class="form-group">
<p>自己紹介</p>
<input name=user[description] value="<%= #user.description %>" class="form-control">
</div>
<div class="actions">
<input type="submit" value="保存" class="btn btn-primary">
</div>
<% end %>
I use gem file
gem 'paperclip'
gem 'aws-sdk', '~> 2.3'
I use rails 5
I do not know where wrong.
So please tell me about the improvement points.

Answer 1

Do this
Remove this line <input name=user[avatar] type="file" value="<%= #user.avatar %>">
And Add this line <%= file_field_tag :avatar %> in place of prev code.
Reference: document
Happy Coding
Cheers!