Hello! Our help will be more effective, if you copy and send us info about your browser and the Savefrom.Net extension:
http://en.savefrom.net/user.php?info=1
We'd also need some links you can't download (to test them).
For the better understanding it'll be great to see a screenshot with the error.
We are waiting for your reply, and thank you for contacting us Savefrom.net Team!

Здравствуйте, для эффективной помощи нам нужна информация о расширении и браузере.
Скопируйте и пришлите информацию указанную здесь: http://ru.savefrom.net/user.php?info=1

Для большего понимания вы можете прислать скриншот экрана с ошибкой.

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, please give us more details.

Hello, please give us more details.

Hello, Reinstall the extension after an older version is uninstalled:

https://addons.opera.com/addons/extensions/details/savefromnet-helper/?display=en

Hello, please, send us more details regarding the problem.

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

Hello, Reinstall the extension after an older version is uninstalled. The current version is 8.75:

https://addons.opera.com/addons/extensions/details/savefromnet-helper/?display=en

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

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

Thank you for using our extension SaveFrom.net Helper