Roon ARC not syncing with Core after upgrade (ref#R3DVR5)

Hi @ggpark1172,
Thank you for your patience while we worked through the queue. Do you have a firewall active on your core device? If so please follow the steps in this post Unable to connect to Roon from Remote or ARC after Windows update - #5 by Pearse_Egan. Please let me know if this resolves your issue.