sudo apt update and and so on in the terminal, and then I got this error. I can't copy and paste this error code, so I wonder what could be the problem. Is it some permissions issue or something else?
An error occurred, please run Package Manager from the right-click menu or apt-get in a terminal to see what is wrong
Error: Opening the cache (E:can not open /var/lib/apt/lists/download.docker.com linux_ubuntu_dists_focal InRelease - fopen (13: Permission denied), E:The package lists or status file could not be parsed or opened. This usually means that your installed packages have unmet dependencies.