Ensure Prettier is installed and defined in your environment PATH variable. You can optionally specify a custom path in `JsPrettier.sublime-settings` using the `prettier_cli_path` setting.

The solution for this is noted below

Ensure Prettier is installed and defined in your environment PATH variable. You can optionally specify a custom path in JsPrettier.sublime-settings using the prettier_cli_path setting.

Solution

#In your terminal run the following:
	which node
	which prettier

# if which prettier result empty then
# npm (global):
    npm install --global prettier

#Copy the result of the output for each step and in
#SublimeText3 proceed to:
#Preferences --> PackageSettings --> JsPrettier --> Settings-User
#In the user settings build your file as such:

{
    "prettier_cli_path": "output from terminal here",
    "node_path": "output from terminal here",
    "auto_format_on_save": true,
}

Try other methods by searching on the site. That is if this doesn’t work