Certain non-alphanumeric characters used in the SNMP trap community could render the SSL Visibility appliance inaccessible at the GUI (WebUI). When this happens, the Login button is grayed out with a "Failed to read/create SNMP configuration" error message.
This has been addressed in SV 3.8.3 and newer versions.
In earlier versions, a factory reset is required to restore access from the GUI interface. The SSL Visibility appliance should continue to function even though the GUI interface is not accessible.