while trying to install Brave Browser I got this error message:
E: Malinformed entry 1 list file/etc/apt/sources.list.d/brave-browser.list (component)
E: The list of sources could not be read
Then in Software Sources I got another alert after it told me to change mirror sites:
Failed to load the package list
This is a serious problem. Try again later. If this problem appears again, please report an error to the developers.
I was installing it on my 2011 MBP when the error occurred. I tried repeatedly to change the mirror site but kept getting the same error message.