Home » Guides » One common issue is the “”Java Application Blocked”” error message. This can occur when Java detects that the application you are trying to run is unsigned or from an untrusted source. To resolve thisOne common issue is the “”Java Application Blocked”” error message. This can occur when Java detects that the application you are trying to run is unsigned or from an untrusted source. To resolve this September 9, 2024 by James Ellison you can add the website or application to the Exception Site List in Java’s security settings.