- Login via the command line
- Edit the file
/etc/apt/sources.list
- Add the following line:
deb http://apt.osmc.tv stretch-devel main
- Run the following commands to update:
sudo apt-get update && sudo apt-get dist-upgrade && reboot
- Your system should have have received the update.
Please see if the issue is resolved.
I also recommend you edit /etc/apt/sources.list
again and remove the line that you added after updating. This will return you to the normal update channel.