Ok, thanks for the info provided. We've forwarded it to developers to check and fix.

Здравствуйте, мы проверили, видео скачивается.

Hello, in order to help you better I need the following information.
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1

Hello, Could you please send a few links you can't download. We will check it out.

For the better understanding it'll be great to see a screenshot with the error.

Hello, we’d like to help you, but we will need some info about your browser and the installed extension first.
Please, go here http://en.savefrom.net/user.php?info=1
Copy the details that you see and send them back to us.
Please also send us some video links that you can’t download.
Thank you for contacting Savefrom.Net support !

Hello, in order to help you better I need the following information.
Please, send me the information listed here: http://en.savefrom.net/user.php?info=1

For the better understanding it'll be great to see a screenshot with the error.

Hello, maybe the problem is in the video itself.

Hello, this extension has been fixed. Please, update or reinstall it from our site.
The latest version is 8.85: https://en.savefrom.net/user.php?vid=387#10
Thank you for using Savefrom.Net browser extension

Hello, our services do not download Instagram stories.