You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。
INFO:
With the Dropbox doc scanner, you can use your phone to add documents to Dropbox. It's easy to scan files instantly or convert existing files to scans with the Dropbox mobile app. You can edit, arrange, and add additional pages to a scan. Learn how to scan documents directly to your Dropbox account in this short video.