Warning message for Ultimate Branding plugin

I see the following warnings on the Branding page and images tab.

Warning: getimagesize() [function.getimagesize]: http:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /home/content/87/11283687/html/portal/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/login-image.php on line 120

Warning: getimagesize(http://portal.mindsharehr.com/wp-admin/images/wordpress-logo.svg) [function.getimagesize]: failed to open stream: no suitable wrapper could be found in /home/content/87/11283687/html/portal/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/login-image.php on line 120

Thanks
Shireen