If you are seeing an error code: 7105 when trying to launch content on Amazon Prime, this is an issue with search results showing for-purchase content as free.
While we don't currently have a workaround for this issue, we will continue to monitor this and update Control Center to reflect any changes made to Amazon's search processes.
Note: If you are seeing this error on FireTV, verify is that you have Control Center connected as a bluetooth (BT) controller. On your FireTV, navigate to Settings>Controllers & Bluetooth Devices>Other Bluetooth Devices and verify that the "Caavo XXXX" is currently connected. This will not completely solve the problem, but can help the way your FireTV handles launching content.