NortonSecurity.exe tries to modify an Acronis backup file

I've installed Norton 360 and Acronis True Image 2018 on Windows 10. In the last few weeks, an Acronis popup message is appearing from time to time that "NortonSecurity.exe" is trying to modify an acronis backup file. How can I stop Norton from doing this and why the hell is "NortonSecurity.exe" even trying to do this? There are no warnings in Norton 360 for any security issues on my system.

As if the unwanted advertising and information popups from Norton and Acronis weren't enough. I'm about to uninstall Norton and Acronis as well. It seems, these both tools are mutating more and more to bloatware.