Undefined index: HTTP_HOST

$ wp –debug
Debug (bootstrap): Using default global config: /usr/local/wp/config.yml (0.422s)
Debug (bootstrap): No project config found (0.423s)
Debug (bootstrap): argv: /usr/local/wp/bin/../php/boot-fs.php –debug (0.423s)
Debug (commandfactory): No doc comment for autoptimize. (0.674s)
PHP Notice: Undefined index: HTTP_HOST in /home/me/example.com/wp-content/plugins/force-https-littlebizzy/core/redirect.php on line 91
Warning: Some code is trying to do a URL redirect. Backtrace:
#0 WP_CLI\Utils\wp_redirect_handler(https://)
#1 call_user_func_array(WP_CLI\Utils\wp_redirect_handler, Array ([0] => https://))