Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) when trying to connect

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Thanks Nick

aa-status gave this output below. But changing unprivileged_port_start=0 seems to have solved the Site Domain issue. I’ll investigate further if needed related to the backup solutions. This was very helpful Nick. Thank you.

$ sudo aa-status
[sudo] password for matei:          
apparmor module is loaded.
39 profiles are loaded.
37 profiles are in enforce mode.
   /usr/bin/evince
   /usr/bin/evince-previewer
   /usr/bin/evince-previewer//sanitized_helper
   /usr/bin/evince-thumbnailer
   /usr/bin/evince//sanitized_helper
   /usr/bin/evince//snap_browsers
   /usr/bin/man
   /usr/bin/redshift
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/NetworkManager/nm-dhcp-helper
   /usr/lib/connman/scripts/dhclient-script
   /usr/lib/cups/backend/cups-pdf
   /usr/lib/lightdm/lightdm-guest-session
   /usr/lib/lightdm/lightdm-guest-session//chromium
   /usr/sbin/cups-browsed
   /usr/sbin/cupsd
   /usr/sbin/cupsd//third_party
   /{,usr/}sbin/dhclient
   libreoffice-senddoc
   libreoffice-soffice//gpg
   libreoffice-xpdfimport
   lsb_release
   man_filter
   man_groff
   nvidia_modprobe
   nvidia_modprobe//kmod
   tcpdump
   ubuntu_pro_apt_news
   ubuntu_pro_esm_cache
   ubuntu_pro_esm_cache//apt_methods
   ubuntu_pro_esm_cache//apt_methods_gpgv
   ubuntu_pro_esm_cache//cloud_id
   ubuntu_pro_esm_cache//dpkg
   ubuntu_pro_esm_cache//ps
   ubuntu_pro_esm_cache//ubuntu_distro_info
   ubuntu_pro_esm_cache_systemctl
   ubuntu_pro_esm_cache_systemd_detect_virt
2 profiles are in complain mode.
   libreoffice-oosplash
   libreoffice-soffice
0 profiles are in kill mode.
0 profiles are in unconfined mode.
2 processes have profiles defined.
2 processes are in enforce mode.
   /usr/sbin/cups-browsed (1428) 
   /usr/sbin/cupsd (1112) 
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
0 processes are in mixed mode.
0 processes are in kill mode.
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