Invalid filename extension in apt sources.list

N: Ignoring file 'yandex-browser.list.save.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'yandex-browser.list.save.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: Type 'andex.ru/yandex-browser/deb' is not known on line 1 in source list /etc/apt/sources.list.d/yandex-browser.list
E: The list of sources could not be read.

How can I fix this?

Solution 1:

Run in terminal

sudo rm /etc/apt/sources.list.d/yandex-browser*

and the problem should be fixed.

Some script or you corrupted some sources.list files while installing Yandex Browser.