rename assets

app/assets/javascripts/admin.js

@@ -2,5 +2,6 @@
 //= require jquery_ujs
 //= require notyf/notyf.min
 //= require simple_form_password_with_hints
+//= require simple_form_image_field
 //= require appstack/app
 //= require_tree ./admin

app/assets/javascripts/application.js

@@ -3,4 +3,4 @@
 //= require jquery3
 //= require jquery_ujs
 //= require simple_form_password_with_hints
-//= require simple_form_image_fields
+//= require simple_form_image_field

app/assets/stylesheets/admin.sass

 @import 'notyf/notyf.min'
 @import 'simple_form_password_with_hints'
+@import 'simple_form_image_field'
 @import 'appstack/light'
 @import 'commons/*'
 @import 'admin/*'

app/assets/stylesheets/application.sass

 @import 'bootstrap'
 @import 'appstack/light'
 @import 'simple_form_password_with_hints'
-@import 'simple_form_image_fields'
+@import 'simple_form_image_field'
 @import 'commons/*'
 @import 'application/*'