How to fix E: The method driver /usr/lib/apt/methods/https could not be found in APT

The simplest solution is to install the missing package:

sudo apt-get install apt-transport-https
sudo apt-get update

This installs the HTTPS method driver and should resolve the issue immediately.

If you cannot install apt-transport-https because apt itself is broken, you need to remove the problematic HTTPS sources first:

# Edit your main sources list
sudo nano /etc/apt/sources.list

Comment out any lines starting with https:// by adding # at the beginning. Then check your sources.list.d directory:

ls /etc/apt/sources.list.d/

For any .list files containing HTTPS URLs, either comment them out or temporarily rename them:

sudo mv /etc/apt/sources.list.d/example-https.list /etc/apt/sources.list.d/example-https.list.bak

Once HTTPS sources are removed, update apt and install the required package:

sudo apt-get update
sudo apt-get install apt-transport-https

Now you can re-enable the HTTPS sources and update again.

After apt-transport-https is installed, restore your HTTPS sources:

# Uncomment lines in /etc/apt/sources.list
sudo nano /etc/apt/sources.list

# Restore .list files in sources.list.d
sudo mv /etc/apt/sources.list.d/example-https.list.bak /etc/apt/sources.list.d/example-https.list

# Update apt with HTTPS sources now available
sudo apt-get update

If automated installation still fails, manually download and install the package. First, identify your architecture:

dpkg-architecture -qDEB_HOST_ARCH

Then download the .deb file for your system. For Raspbian/Debian ARM systems:

wget http://mirrordirector.raspbian.org/raspbian/pool/main/a/apt/apt-transport-https_1.0.9.8.4_armhf.deb
sudo dpkg -i apt-transport-https_1.0.9.8.4_armhf.deb

For Ubuntu systems, find the correct URL from archive.ubuntu.com or a mirror site, matching your release and architecture.