[debug] [W3C] Encountered internal error running command: Error: Neither ANDROID_HOME nor ANDROID_SDK_ROOT environment variable was exported. Read https://developer.android.com/studio/command-line/variables for more details code example

Example: [debug] [W3C] Encountered internal error running command: Error: Neither ANDROID_HOME nor ANDROID_SDK_ROOT environment variable was exported. Read https://developer.android.com/studio/command-line/variables for more details

set the ANDROID_HOME using bash_profile.

Then run the source ~/.bash_profile before running appium from terminal.