Unknown audio OP code

[MochyPei]

Bot don't play anything, url, or file (wav, ogg, mp3), in logs it sends this

18:01:46.991 [JDA Gateway-Worker 1] DEBUG net.dv8tion.jda.internal.requests.WebSocketClient - Sending voice request {"op":4,"d":{"self_deaf":false,"guild_id":"744189716722745394","channel_id":null,"self_mute":false}} 18:01:47.523 [JDA Gateway-Worker 1] DEBUG net.dv8tion.jda.internal.requests.WebSocketClient - Sending voice request {"op":4,"d":{"self_deaf":false,"guild_id":744189716722745394,"channel_id":1059879536289919107,"self_mute":false}} 18:01:48.055 [JDA AudioWS-ReadThread (guildId: 744189716722745394)] DEBUG net.dv8tion.jda.internal.audio.AudioWebSocket - Using encryption mode xsalsa20_poly1305_lite 18:01:54.103 [JDA AudioWS-ReadThread (guildId: 744189716722745394)] DEBUG net.dv8tion.jda.internal.audio.AudioWebSocket - Unknown Audio OP code. {"op":18,"d":{"user_id":"745325857228455976","flags":null}}

I didn't do anything to the bot or the java, I just didn't run this bot for about 5 months.