resolving dependencies...	 

looking for conflicting packages...	 

Packages (24) exempi-2.5.2-1 libmatekbd-1.24.1-1 libmatemixer-1.24.1-1 libmateweather-1.24.0-1 libwnck3-3.36.0-1	 

libxklavier-5.4-3 libxpresent-1.0.0-2 libxres-1.2.0-2 yelp-3.38.1-1 yelp-xsl-3.38.1-1 caja-1.24.0-1	 

marco-1.24.1-1 mate-backgrounds-1.24.1-1 mate-control-center-1.24.1-1 mate-desktop-1.24.1-1	 

mate-icon-theme-1.24.0-1 mate-menus-1.24.1-1 mate-notification-daemon-1.24.1-1 mate-panel-1.24.1-1	 

mate-polkit-1.24.0-1 mate-session-manager-1.24.1-1 mate-settings-daemon-1.24.1-1 mate-themes-3.22.21-1	 

mate-user-guide-1.24.0-1	 

Total Installed Size: 292.28 MiB	 

checking keys in keyring	 

downloading required keys...	 

error: key "3B94A80E50A477C7" could not be looked up remotely 	 

error: required key missing from keyring 	 

error: failed to commit transaction (unexpected error) 	 

Errors occurred, no packages were upgraded.	 

Command finished with errors!