fix error

app/controllers/admin/galleries_controller.rb

@@ -381,8 +381,8 @@ class Admin::GalleriesController < OrbitAdminController
     if sheet.count <= 203
       sheet.each_with_index do |row, i|
         next if i < 3
-        v = row.cells.first.value
-        next if v == "" || v.nil?
+        v = row.cells.first.value rescue nil
+        next if v.blank?
         import_this_image(row, album)
       end
       redirect_to admin_gallery_path(album.id)

app/helpers/admin/galleries_helper.rb

@@ -3,15 +3,14 @@ module Admin::GalleriesHelper
     value = {}
     image = AlbumImage.new
     row.cells.each_with_index do |cell,index|
-      next if cell.nil?
-      val = cell.value
-      next if val.nil? || val == ""
+      val = cell.value rescue nil
+      next if val.blank?
       case index
       when 0
         image.remote_file_url = val
       when 1
         value["zh_tw"] = val
-        value["en"] = row.cells[index + 1].value rescue ""
+        value["en"] = (row.cells[index + 1].value rescue "")
         image.description_translations = value
       end
     end