Warning on Login: getimagesize

I am getting the following warning on login. Can you help me with it please.
Warning: getimagesize(https://caribecampo.com/wp-admin/images/wordpress-logo.svg): failed to open stream: HTTP request failed! HTTP/1.1 403 Forbidden in /home/campo/public_html/campo-content/plugins/ultimate-branding/ultimate-branding-files/modules/login-image.php on line 121

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