R310 is no longer supported on the Unleashed version 184.108.40.206.243.
Below information is mentioned on the release notes.
"Remove Wave 1 AP Support
802.11ac Wave 1 APs are no longer supported. Unleashed R310, R500, R600, and T300 series do not support firmware release 200.8 or later and cannot be upgraded to this release."
Release notes of 220.127.116.11.243:https://support.ruckuswireless.com/documents/3125-ruckus-unleashed-200-8-ga-release-notes/download