Ubuntu – “method driver /usr/lib/apt/methods/https could not be found” update error

sudo apt-get update
E: The method driver /usr/lib/apt/methods/https could not be found.
michael@Ubuntu:~$ sudo apt-get clean
michael@Ubuntu:~$ cd /var/lib/apt
michael@Ubuntu:/var/lib/apt$ sudo mv lists lists.old
michael@Ubuntu:/var/lib/apt$ sudo mkdir -p lists/partial
michael@Ubuntu:/var/lib/apt$ sudo apt-get clean
michael@Ubuntu:/var/lib/apt$ sudo apt-get update
E: The method driver /usr/lib/apt/methods/https could not be found.
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
michael@Ubuntu:/var/lib/apt$ sudo apt-get update
E: The method driver /usr/lib/apt/methods/https could not be found.

Why am I getting these errors when doing an apt-get update?