Getting a strange error message:- Warning:

Getting a strange error message:-

Warning: getimagesize(http://yourcouncillor.net/wp-admin/images/wordpress-logo.svg): failed to open stream: HTTP request failed! HTTP/1.1 403 Forbidden in /home/yourco/public_html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/login-image.php on line 250

Changed the image several times but keeps appearing on login screen.

Any ideas?

Thanks,

Ken