Please understand that we only provide website hosting. Using our hosting for an API or data storage for another application is not allowed or supported, and will probably be blocked by this security system:
My guess is that your school’s firewall is blocking connections to our servers. We host a lot of websites on every IP address, and free services unfortunately tend to be abused a lot. This results in some network administrators just blocking all access to our servers, regardless of the consequences of many legitimate websites.
Only your school’s network administrators can solve this I’m afraid.