Sending a message to users using the Administration -> Client Details -> Send Message function no longer works after upgrading to 24.3.5. This only appears to fail when HTTPS is configured.
DX NetOps Spectrum 24.3.5+
This issue is targeted to be resolved in Spectrum version 24.3.9. Administrators will be able to send messages to users using the Administration -> Client Details -> Send Message functionality when HTTPS is configured.