Wrapper Error being caused by plugin

I am using the Maintenance Pro plugin for word press. Everytime I try to use a logo, I get this message:

Warning: getimagesize(): http:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /data/2/0/39/138/202138/user/205275/htdocs/gymsportwp/wp-content/plugins/maintenance/load/index.php on line 20

Warning: getimagesize(http://gym-sport.com/gymsportwp/wp-content/uploads/2017/02/GymSport-Logo-Blue-n-white-ffor-footer-250x100px.png): failed to open stream: no suitable wrapper could be found in /data/2/0/39/138/202138/user/205275/htdocs/gymsportwp/wp-content/plugins/maintenance/load/index.php on line 20

Any idea what I can do to solved this issue?