Theme Customizer Not Working

Hello,

I am having some trouble with regards to using the theme customizer with WP. I have recently installed WP to my FTP using iPage, and after installing, I can access my account, and when I access the theme customizer, whenever I select a theme to customize, the customizer keeps loading endlessly, and never lets me customize the theme I have selected.

I have tried to disable all the plugin’s, I have tried other free and premium theme’s, and I have tried resetting my browser, switching the browser, yet after each attempt, I still can;t get the theme customizer to work, it still keeps loading endlessly.

Any help would greatly be appreciated.

Mustafa