Is it: You don't even see the [Reposition] and [Change Cover] buttons?
Did you try to turn your device 90° right?

Installed the component and still do not see any option to change or reposition the cover photo.
Device tested on : iphone 4s
Browser : Safari

Please have a look into it and appreciate your work.

Sir I texted two different device
Web link https://newblue.ongolito.net/
Samsung j2 and Microsoft Lumia 430
Android 5.0 and Windows 10 mobile
Chrome/firefox and Microsoft Edge
Working and working
Thanks working fine....

Tested successfully on Nexus 7 tablet and Chrome