Open terminal and do 'sudo apt-get update' then 'sudo apt-get upgrade' if that doesn't fix your issue try 'sudo apt-get -f install' This issue looks like a broken package or outdated repository source, or maybe your ISP is frequenting problems contacting the source.
Open terminal and do 'sudo apt-get update' then 'sudo apt-get upgrade' if that doesn't fix your issue try 'sudo apt-get -f install' This issue looks like a broken package or outdated repository source, or maybe your ISP is frequenting problems contacting the source.