[DiscordSRV - Initialization/ERROR]: [DiscordSRV] Plugin DiscordSRV v15.4 has failed to register events for class github.scarsz.discordsrv.hooks.chat.UltimateChatHook because br/net/fabiozumbi12/UltimateChat/API/SendChannelMessageEvent does not exist.

Update UltimateChat

DiscordSRV is outdated, not uchat. It updated the API some time ago.