Program breaks on scanning

[noise503]

I am testing my domain bluebird.com.sv and program breaks with following error

[i] Enumerating Wordpress users
Traceback (most recent call last):
File "main.py", line 52, in
wp = Wordpress(format_url(results.url), results.random_agent, results.nocheck, results.max_threads)
File "/root/Tools/Wordpresscan/engine/wordpress.py", line 35, in init
self.enum_wordpress_users()