FMOD MISSING EVENT, is it possible to resolve that?

2016/10/09 22:43:54 36238421 3b7 [INFO Client 2344] Abnormal disconnect: An unexpected disconnection occurred.
2016/10/09 22:44:25 36269500 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/UI/PVP/Countdown_01.ogg
2016/10/09 22:44:25 36269500 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/UI/PVP/Countdown_02.ogg
2016/10/09 22:44:25 36269500 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/UI/PVP/Countdown_03.ogg
2016/10/09 22:44:25 36269500 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/UI/PVP/Countdown_04.ogg
2016/10/09 22:44:25 36269500 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/UI/PVP/Countdown_05.ogg
2016/10/09 22:44:25 36269640 75c [DEBUG Client 2344] Got Instance Details from login server
2016/10/09 22:44:26 36269937 778 [INFO Client 2344] Just before calling client instance session
2016/10/09 22:44:26 36269937 cd [INFO Client 2344] Connecting to instance server at 169.57.135.70:6112
2016/10/09 22:44:26 36270125 111 [DEBUG Client 2344] Connect time to instance server was 188ms
2016/10/09 22:44:26 36270640 52 [WARN Client 2344] FMOD Failed to load bank FMOD/Desktop/_Monsters_Goatman.bank with error code 18
2016/10/09 22:44:28 36272406 52 [WARN Client 2344] FMOD Failed to load bank FMOD/Desktop/_Monsters_Axis_Caster.bank with error code 18
2016/10/09 22:44:28 36272421 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/WeaponImpacts/Gore/Gore_Impact_LNG_$(#).ogg%20SG
2016/10/09 22:44:36 36279765 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effect/MonsterSounds/FireElemental/Chunk_$(#).loop.oggSG
2016/10/09 22:44:39 36282718 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/Skills/Fireball/Fireball_Impact_01.oggSG
2016/10/09 22:44:39 36282812 65 [WARN Client 2344] FMOD MISSING EVENT: event:/Sound Effects/Skills/Charged_Blast/ChargedBlast.loop.oggSG
2016/10/09 22:44:42 36285734 6d [INFO Client 2344] Tile hash: 3038661668
2016/10/09 22:44:42 36285734 6e [INFO Client 2344] Doodad hash: 0
2016/10/09 22:44:42 36286015 6aa [DEBUG Client 2344] Joined guild named Wall_Street_Wolves with 6 members
2016/10/09 22:44:44 36287953 903 [DEBUG Client 2344] Entering area 3_4_town

You can try running a pack check, or deleting your content.ggpk and re downloading it to see if that fixes it (or even a complete and fresh install). This has been going on since the new sound engine was implemented and generally speaking, doesn't have much of an impact on the game.