I am currently running The Hypixel Skyblock Custom Pack with Optifine 1.13, but whenever I shoot an arrow in game, it crashes! I looked and found somebody with the same issue, but I still can't figure out how to fix it!

Here is my crash report:

Hope it helps somebody figure out what is happening!

Minecraft Crash Report -------- Minecraft Crash Report ----// This doesn't make any sense!
Time: 9/20/19 10:49 PMDescription: Ticking entity
java.lang.ClassCastException: java.util.Optional cannot be cast to java.lang.Integer at aoi.q(SourceFile:136) at aoi.b(SourceFile:121) at aoi.R_(SourceFile:106) at axs.a(SourceFile:1240) at axs.g(SourceFile:1215) at axs.o_(SourceFile:1097) at cfi.m(SourceFile:1277) at cfi.c(SourceFile:818) at cfi.a(SourceFile:392) at net.minecraft.client.main.Main.main(SourceFile:144) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Client threadStacktrace: at aoi.q(SourceFile:136) at aoi.b(SourceFile:121) at aoi.R_(SourceFile:106) at axs.a(SourceFile:1240) at axs.g(SourceFile:1215)
– Entity being ticked --Details: Entity Type: minecraft:arrow (aoi) Entity ID: 8514945 Entity Name: Arrow Entity's Exact location: 7.56, 100.81, 10.47 Entity's Block location: World: (7,100,10), Chunk: (at 7,6,10 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Entity's Momentum: 0.00, -0.05, 0.00 Entity's Passengers: [] Entity's Vehicle: ~_ERROR~ NullPointerException: nullStacktrace: at axs.o_(SourceFile:1097)
– Affected level --Details: Level name: MpServer All players: 2 total; [csy['SpicyCheet0'/53256, l='MpServer', x=7.50, y=100.00, z=7.50], csz['goodboi_emil'/8513769, l='MpServer', x=7.50, y=111.85, z=7.50]] Chunk stats: MultiplayerChunkCache: 289, 289 Level seed: 0 Level generator: ID 00 - default, ver 1. Features enabled: false Level generator options: {} Level spawn location: World: (0,100,0), Chunk: (at 0,6,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Level time: 143 game time, 2002 day time Level dimension: 0 Level storage version: 0x00000 - Unknown? Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false Forced entities: 137 total; [alv[''/8513665, l='MpServer', x=-45.50, y=100.88, z=29.50], aoi['Arrow'/8514945, l='MpServer', x=7.56, y=100.81, z=10.47], aoi['Arrow'/8514944, l='MpServer', x=7.56, y=101.31, z=10.47], alx['Item Frame'/8513667, l='MpServer', x=5.50, y=101.50, z=24.03], aoi['Arrow'/8514947, l='MpServer', x=7.56, y=100.81, z=10.47], alv['Armor Stand'/8513666, l='MpServer', x=-47.50, y=106.00, z=48.50], aoi['Arrow'/8514946, l='MpServer', x=7.56, y=100.81, z=10.47], alv['Armor Stand'/8513669, l='MpServer', x=-53.50, y=106.00, z=54.50], alv['Armor Stand'/8513668, l='MpServer', x=-47.50, y=101.00, z=54.50], aoi['Arrow'/8514948, l='MpServer', x=7.56, y=100.81, z=10.47], alv['Armor Stand'/8513671, l='MpServer', x=2.84, y=102.44, z=24.50], alv['Armor Stand'/8513670, l='MpServer', x=2.25, y=103.03, z=24.25], alv['Armor Stand'/8513673, l='MpServer', x=2.75, y=103.03, z=24.25], alv['Armor Stand'/8513672, l='MpServer', x=2.25, y=102.44, z=24.50], alv['Armor Stand'/8513675, l='MpServer', x=2.78, y=103.03, z=24.75], alv['Armor Stand'/8513674, l='MpServer', x=2.25, y=103.03, z=24.75], alv['Armor Stand'/8513676, l='MpServer', x=-52.50, y=100.00, z=29.50], alv[''/8513678, l='MpServer', x=-52.59, y=103.88, z=28.75], alv[''/8513680, l='MpServer', x=-53.50, y=103.00, z=30.50], alv[''/8513682, l='MpServer', x=-51.50, y=103.00, z=28.50], alv[''/8513684, l='MpServer', x=-54.50, y=103.00, z=30.50], alv['Armor Stand'/8513687, l='MpServer', x=-53.50, y=106.00, z=48.50], alv[''/8513686, l='MpServer', x=-51.50, y=103.00, z=29.50], alv['Armor Stand'/8513689, l='MpServer', x=3.44, y=103.09, z=24.22], alv['Armor Stand'/8513688, l='MpServer', x=3.44, y=103.28, z=24.50], alv['Armor Stand'/8513691, l='MpServer', x=3.44, y=103.00, z=24.50], alv['Armor Stand'/8513690, l='MpServer', x=3.44, y=103.88, z=24.78], alv['Armor Stand'/8513693, l='MpServer', x=-0.13, y=103.03, z=24.41], alv['Armor Stand'/8513692, l='MpServer', x=-53.50, y=101.00, z=48.50], alv['Armor Stand'/8513695, l='MpServer', x=-0.16, y=102.44, z=24.66], alv['Armor Stand'/8513694, l='MpServer', x=0.44, y=102.44, z=24.69], alv['Armor Stand'/8513697, l='MpServer', x=-0.22, y=103.03, z=24.94], alv['Armor Stand'/8513696, l='MpServer', x=0.41, y=103.03, z=24.44], alv['Armor Stand'/8513698, l='MpServer', x=0.38, y=103.03, z=24.97], alv['Armor Stand'/8513700, l='MpServer', x=-47.50, y=106.00, z=54.50], alx['Item Frame'/8513703, l='MpServer', x=4.50, y=105.50, z=28.97], alv['Armor Stand'/8513702, l='MpServer', x=-53.50, y=101.00, z=54.50], alv['Armor Stand'/8513705, l='MpServer', x=-31.66, y=98.84, z=43.31], alv['Armor Stand'/8513704, l='MpServer', x=-31.75, y=98.50, z=43.03], alv['Armor Stand'/8513707, l='MpServer', x=-31.88, y=98.84, z=42.84], alv['Armor Stand'/8513706, l='MpServer', x=-31.56, y=98.84, z=42.97], alv['Armor Stand'/8513709, l='MpServer', x=-32.00, y=99.25, z=43.56], alv['Armor Stand'/8513708, l='MpServer', x=-32.03, y=98.84, z=43.13], alv['Armor Stand'/8513711, l='MpServer', x=-32.34, y=99.66, z=42.84], alv['Armor Stand'/8513710, l='MpServer', x=-32.00, y=99.69, z=43.56], alv['Armor Stand'/8513713, l='MpServer', x=-31.31, y=99.69, z=43.31], alv['Armor Stand'/8513712, l='MpServer', x=-32.34, y=99.22, z=42.84], alv['Armor Stand'/8513715, l='MpServer', x=-31.56, y=99.69, z=42.50], alv['Armor Stand'/8513714, l='MpServer', x=-31.28, y=99.25, z=43.31], alv['Armor Stand'/8513717, l='MpServer', x=-32.44, y=99.16, z=43.31], alv['Armor Stand'/8513716, l='MpServer', x=-31.56, y=99.25, z=42.53], alv['Armor Stand'/8513719, l='MpServer', x=-32.47, y=99.75, z=43.34], alv['Armor Stand'/8513718, l='MpServer', x=-32.34, y=99.75, z=43.69], alv['Armor Stand'/8513721, l='MpServer', x=-32.44, y=99.44, z=42.66], alv['Armor Stand'/8513720, l='MpServer', x=-32.09, y=99.47, z=43.44], alv['Armor Stand'/8513723, l='MpServer', x=-31.50, y=100.34, z=42.56], alv['Armor Stand'/8513722, l='MpServer', x=-31.97, y=99.19, z=43.34], alv['Armor Stand'/8513725, l='MpServer', x=-31.75, y=100.34, z=42.66], alv['Armor Stand'/8513724, l='MpServer', x=-31.44, y=100.34, z=42.88], alv['Armor Stand'/8513727, l='MpServer', x=-31.25, y=100.34, z=43.34], alv['Armor Stand'/8513726, l='MpServer', x=-31.63, y=100.34, z=42.94], alv['Armor Stand'/8513729, l='MpServer', x=-31.47, y=100.34, z=43.44], alv['Armor Stand'/8513728, l='MpServer', x=-31.09, y=100.34, z=43.56], alv['Armor Stand'/8513731, l='MpServer', x=-32.06, y=100.34, z=43.97], alv['Armor Stand'/8513730, l='MpServer', x=-31.84, y=100.34, z=43.88], alv['Armor Stand'/8513733, l='MpServer', x=-32.16, y=100.34, z=43.69], alv['Armor Stand'/8513732, l='MpServer', x=-31.38, y=100.34, z=43.66], alv['Armor Stand'/8513735, l='MpServer', x=-32.25, y=100.31, z=42.88], alv['Armor Stand'/8513734, l='MpServer', x=-31.97, y=100.34, z=43.59], alv['Armor Stand'/8513737, l='MpServer', x=-32.38, y=100.31, z=43.22], alv['Armor Stand'/8513736, l='MpServer', x=-32.50, y=100.31, z=42.97], alv['Armor Stand'/8513739, l='MpServer', x=-31.88, y=98.84, z=47.09], alv['Armor Stand'/8513738, l='MpServer', x=-32.13, y=100.31, z=43.09], alv['Armor Stand'/8513741, l='MpServer', x=-31.94, y=98.84, z=47.56], alv['Armor Stand'/8513740, l='MpServer', x=-32.50, y=98.59, z=47.06], alv['Armor Stand'/8513743, l='MpServer', x=-31.50, y=99.19, z=47.59], alv['Armor Stand'/8513742, l='MpServer', x=-32.56, y=98.59, z=47.50], alv['Armor Stand'/8513745, l='MpServer', x=-33.06, y=98.59, z=47.03], alv['Armor Stand'/8513744, l='MpServer', x=-31.47, y=99.19, z=47.16], alv['Armor Stand'/8513747, l='MpServer', x=-33.38, y=98.50, z=47.00], alv['Armor Stand'/8513746, l='MpServer', x=-33.09, y=98.59, z=47.47], alv['Armor Stand'/8513749, l='MpServer', x=-31.47, y=98.81, z=48.28], alv['Armor Stand'/8513748, l='MpServer', x=-33.41, y=98.50, z=47.44], alv['Armor Stand'/8513751, l='MpServer', x=-32.44, y=99.50, z=48.16], alv['Armor Stand'/8513750, l='MpServer', x=-31.38, y=98.81, z=47.28], alv['Armor Stand'/8513753, l='MpServer', x=-47.50, y=101.00, z=48.50], alv['Armor Stand'/8513752, l='MpServer', x=-32.34, y=99.50, z=47.22], alv['Armor Stand'/8513755, l='MpServer', x=1.59, y=103.09, z=24.09], alv['Armor Stand'/8513754, l='MpServer', x=1.59, y=103.28, z=24.44], alv['Armor Stand'/8513757, l='MpServer', x=1.59, y=103.00, z=24.44], alv['Armor Stand'/8513756, l='MpServer', x=1.59, y=103.88, z=24.72], alx['Item Frame'/8513758, l='MpServer', x=7.50, y=101.50, z=22.97], csz['goodboi_emil'/8513769, l='MpServer', x=7.50, y=111.85, z=7.50], csy['SpicyCheet0'/53256, l='MpServer', x=8.50, y=65.00, z=8.50], csy['SpicyCheet0'/53256, l='MpServer', x=7.50, y=100.00, z=7.50], alv[''/8513843, l='MpServer', x=-2.50, y=100.09, z=0.50], alv[''/8513842, l='MpServer', x=-2.50, y=100.34, z=0.50], alv[''/8513844, l='MpServer', x=-2.50, y=99.84, z=0.50], anx['Villager'/8513607, l='MpServer', x=9.50, y=100.00, z=33.50], anx['Villager'/8513609, l='MpServer', x=9.50, y=100.00, z=33.50], anx['Villager'/8513608, l='MpServer', x=9.50, y=100.00, z=33.50], anx['Villager'/8513611, l='MpServer', x=-2.50, y=100.00, z=0.50], anx['Villager'/8513610, l='MpServer', x=9.03, y=100.00, z=33.69], csz['goodboi_emil'/8513769, l='MpServer', x=7.50, y=111.85, z=7.50], alv['Armor Stand'/8513624, l='MpServer', x=-52.50, y=100.00, z=36.50], alv[''/8513626, l='MpServer', x=-51.50, y=103.00, z=35.50], alv[''/8513628, l='MpServer', x=-50.50, y=103.00, z=34.50], alv[''/8513630, l='MpServer', x=-50.50, y=103.00, z=38.50], alv['Armor Stand'/8513633, l='MpServer', x=-1.59, y=103.28, z=24.63], alv[''/8513632, l='MpServer', x=-53.50, y=103.00, z=36.50], alv['Armor Stand'/8513635, l='MpServer', x=-1.56, y=103.88, z=24.97], alv['Armor Stand'/8513634, l='MpServer', x=-1.63, y=103.09, z=24.34], alv['Armor Stand'/8513637, l='MpServer', x=9.28, y=100.00, z=24.50], alv['Armor Stand'/8513636, l='MpServer', x=-1.59, y=103.00, z=24.63], alv['Armor Stand'/8513639, l='MpServer', x=9.25, y=100.00, z=23.59], alv['Armor Stand'/8513638, l='MpServer', x=9.28, y=100.00, z=24.03], alv['Armor Stand'/8513641, l='MpServer', x=9.25, y=100.00, z=22.72], alv['Armor Stand'/8513640, l='MpServer', x=9.25, y=100.00, z=23.16], alv['Armor Stand'/8513643, l='MpServer', x=9.66, y=100.00, z=22.72], alv['Armor Stand'/8513642, l='MpServer', x=9.69, y=100.00, z=24.00], alv['Armor Stand'/8513645, l='MpServer', x=9.66, y=100.00, z=23.59], alv['Armor Stand'/8513644, l='MpServer', x=9.66, y=100.00, z=23.13], alv['Armor Stand'/8513647, l='MpServer', x=9.50, y=99.41, z=24.44], alv['Armor Stand'/8513646, l='MpServer', x=9.69, y=100.00, z=24.50], alv['Armor Stand'/8513649, l='MpServer', x=9.47, y=98.28, z=22.94], alv['Armor Stand'/8513648, l='MpServer', x=9.50, y=99.84, z=24.44], alv['Armor Stand'/8513651, l='MpServer', x=9.25, y=100.13, z=23.63], alv['Armor Stand'/8513650, l='MpServer', x=9.47, y=98.91, z=22.94], alv['Armor Stand'/8513653, l='MpServer', x=10.38, y=99.50, z=23.28], alv['Armor Stand'/8513652, l='MpServer', x=9.78, y=100.13, z=23.41], alv['Armor Stand'/8513655, l='MpServer', x=9.59, y=99.72, z=22.94], alv['Armor Stand'/8513654, l='MpServer', x=9.50, y=100.13, z=24.44], alv['Armor Stand'/8513657, l='MpServer', x=-46.50, y=100.00, z=29.50], alv['Armor Stand'/8513656, l='MpServer', x=9.59, y=99.38, z=22.94], alv[''/8513659, l='MpServer', x=-44.50, y=100.88, z=30.50], alv[''/8513661, l='MpServer', x=-44.50, y=100.88, z=31.50], alv[''/8513663, l='MpServer', x=-44.50, y=100.88, z=31.50]] Retry entities: 0 total; [] Server brand: vanilla Server type: Non-integrated multiplayer serverStacktrace: at cqv.a(WorldClient.java:589) at cfi.b(SourceFile:1811) at cfi.a(SourceFile:400) at net.minecraft.client.main.Main.main(SourceFile:144) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)