The game crashed whilst tesselating block model
Error: java.util.ConcurrentModificationException

this is the error message i receive after logging in for 2 seconds and going on to any server

only started today

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Would you like a cupcake?
Time: 8/30/18 1:16 AMDescription: Tesselating block model
java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.remove(ArrayList.java:865) at axx.a(SourceFile:1525) at bni.a(SourceFile:703) at cwu.a(SourceFile:143) at cwu.f(SourceFile:135) at bhh.a(SourceFile:229) at blb.g(SourceFile:213) at bcr.a_(SourceFile:540) at blb.a(SourceFile:71) at bcr.j(SourceFile:549) at blb.b(SourceFile:91) at cuv$b.a(SourceFile:404) at cuv.a(SourceFile:129) at cuv.b(SourceFile:74) at cuv.a(SourceFile:45) at cut.a(SourceFile:60) at cws.b(SourceFile:199) at cwp.a(SourceFile:103) at cwp.run(SourceFile:45) at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Client threadStacktrace: at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.remove(ArrayList.java:865) at axx.a(SourceFile:1525) at bni.a(SourceFile:703) at cwu.a(SourceFile:143) at cwu.f(SourceFile:135) at bhh.a(SourceFile:229) at blb.g(SourceFile:213) at bcr.a_(SourceFile:540) at blb.a(SourceFile:71) at bcr.j(SourceFile:549) at blb.b(SourceFile:91) at cuv$b.a(SourceFile:404) at cuv.a(SourceFile:129) at cuv.b(SourceFile:74)
– Block model being tesselated --Details: Block: Block{minecraft:quartz_block} Block location: World: (-3411,69,1960), Chunk: (at 13,4,8 in -214,122; contains blocks -3424,0,1952 to -3409,255,1967), Region: (-7,3; contains chunks -224,96 to -193,127, blocks -3584,0,1536 to -3073,255,2047) Using AO: trueStacktrace: at cuv.a(SourceFile:45)
– Block being tesselated --Details: Block: Block{minecraft:quartz_block} Block location: World: (-3411,69,1960), Chunk: (at 13,4,8 in -214,122; contains blocks -3424,0,1952 to -3409,255,1967), Region: (-7,3; contains chunks -224,96 to -193,127, blocks -3584,0,1536 to -3073,255,2047)Stacktrace: at cut.a(SourceFile:60)
– Affected level --Details: Level name: MpServer All players: 1 total; [cti['izzyyyyyyy'/9226, l='MpServer', x=-3461.74, y=67.00, z=1973.62]] Chunk stats: MultiplayerChunkCache: 121, 121 Level seed: 0 Level generator: ID 00 - default, ver 1. Features enabled: false Level generator options: {} Level spawn location: World: (-6589,70,17240), Chunk: (at 3,4,8 in -412,1077; contains blocks -6592,0,17232 to -6577,255,17247), Region: (-13,33; contains chunks -416,1056 to -385,1087, blocks -6656,0,16896 to -6145,255,17407) Level time: 126017 game time, 348823257 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: 66 total; [amd['Painting'/515935426, l='MpServer', x=-3489.50, y=63.00, z=1946.03], aly['Armor Stand'/515935302, l='MpServer', x=-3445.50, y=69.00, z=2005.50], amd['Painting'/515935430, l='MpServer', x=-3494.03, y=71.50, z=1945.50], aly['Armor Stand'/515935303, l='MpServer', x=-3446.50, y=69.00, z=2005.50], aly['Armor Stand'/515935304, l='MpServer', x=-3447.50, y=69.00, z=2005.50], akl['Wolf'/515935305, l='MpServer', x=-3490.65, y=50.00, z=2005.69], akl['Wolf'/515935306, l='MpServer', x=-3490.30, y=62.00, z=2011.98], akl['Wolf'/515935307, l='MpServer', x=-3497.99, y=66.00, z=2013.70], akl['Wolf'/515935308, l='MpServer', x=-3501.87, y=66.50, z=2007.70], akl['Wolf'/515935309, l='MpServer', x=-3490.80, y=66.00, z=2000.30], akl['Wolf'/515935310, l='MpServer', x=-3493.55, y=66.00, z=2002.70], aly['Armor Stand'/515935961, l='MpServer', x=-3402.50, y=71.00, z=2003.50], aly['Armor Stand'/515935578, l='MpServer', x=-3509.50, y=61.00, z=1961.50], aly['Armor Stand'/515935579, l='MpServer', x=-3509.50, y=61.00, z=1960.50], aoa[''/515935592, l='MpServer', x=-3507.70, y=72.00, z=1960.30], aoa['Thing 2'/515935594, l='MpServer', x=-3509.30, y=72.00, z=1954.70], aly['Armor Stand'/515935744, l='MpServer', x=-3517.50, y=69.00, z=1946.50], cti['izzyyyyyyy'/9226, l='MpServer', x=-3461.74, y=67.00, z=1973.62], aly[''/515935249, l='MpServer', x=-3474.50, y=61.00, z=1993.50], akl['Dinnerbone'/515935250, l='MpServer', x=-3478.44, y=66.00, z=1989.86], aoa['Dexter'/515935251, l='MpServer', x=-3463.50, y=66.00, z=1995.50], aoa['Tom Hanks'/515935252, l='MpServer', x=-3465.50, y=66.00, z=1995.50], ama['Item Frame'/515935253, l='MpServer', x=-3445.50, y=86.50, z=1984.97], ama['Item Frame'/515935254, l='MpServer', x=-3446.50, y=86.50, z=1984.97], ama['Item Frame'/515935255, l='MpServer', x=-3447.50, y=86.50, z=1984.97], ama['Item Frame'/515935256, l='MpServer', x=-3448.50, y=86.50, z=1984.97], ama['Item Frame'/515935257, l='MpServer', x=-3449.50, y=86.50, z=1984.97], ama['Item Frame'/515935258, l='MpServer', x=-3449.50, y=85.50, z=1984.97], ama['Item Frame'/515935259, l='MpServer', x=-3449.50, y=84.50, z=1984.97], ama['Item Frame'/515935260, l='MpServer', x=-3449.50, y=83.50, z=1984.97], ama['Item Frame'/515935261, l='MpServer', x=-3448.50, y=85.50, z=1984.97], amd['Painting'/515935276, l='MpServer', x=-3481.00, y=61.00, z=1947.97], ama['Item Frame'/515935262, l='MpServer', x=-3447.50, y=85.50, z=1984.97], amd['Painting'/515935278, l='MpServer', x=-3486.97, y=61.00, z=1946.00], ama['Item Frame'/515935263, l='MpServer', x=-3446.50, y=85.50, z=1984.97], ama['Item Frame'/515935264, l='MpServer', x=-3445.50, y=85.50, z=1984.97], ama['Item Frame'/515935265, l='MpServer', x=-3445.50, y=83.50, z=1984.97], ama['Item Frame'/515935266, l='MpServer', x=-3445.50, y=84.50, z=1984.97], ama['Item Frame'/515935267, l='MpServer', x=-3446.50, y=84.50, z=1984.97], aly['Armor Stand'/515935779, l='MpServer', x=-3474.50, y=66.00, z=1911.50], ama['Item Frame'/515935268, l='MpServer', x=-3446.50, y=83.50, z=1984.97], ama['Item Frame'/515935269, l='MpServer', x=-3447.50, y=83.50, z=1984.97], ama['Item Frame'/515935270, l='MpServer', x=-3447.50, y=84.50, z=1984.97], ama['Item Frame'/515935271, l='MpServer', x=-3448.50, y=84.50, z=1984.97], amd['Painting'/515935288, l='MpServer', x=-3480.03, y=76.50, z=1944.50], ama['Item Frame'/515935272, l='MpServer', x=-3448.50, y=83.50, z=1984.97], amd['Painting'/515935289, l='MpServer', x=-3478.00, y=74.00, z=1948.97], aly['Armor Stand'/515935273, l='MpServer', x=-3458.50, y=73.00, z=2005.50], aly[''/515935785, l='MpServer', x=-3398.50, y=35.00, z=1963.50], akl['Wolf'/515935274, l='MpServer', x=-3487.30, y=66.00, z=2006.45], aly[''/515935786, l='MpServer', x=-3398.50, y=34.00, z=1963.50], amd['Painting'/515935276, l='MpServer', x=-3481.00, y=61.00, z=1947.97], amd['Painting'/515935278, l='MpServer', x=-3486.97, y=61.00, z=1946.00], ama['Item Frame'/515935279, l='MpServer', x=-3474.03, y=59.50, z=1945.50], aly['Armor Stand'/515935919, l='MpServer', x=-3402.50, y=66.00, z=1947.50], ama['Item Frame'/515935280, l='MpServer', x=-3474.03, y=59.50, z=1946.50], ama['Item Frame'/515935281, l='MpServer', x=-3474.03, y=58.50, z=1946.50], ama['Item Frame'/515935282, l='MpServer', x=-3474.03, y=58.50, z=1945.50], amd['Painting'/515935426, l='MpServer', x=-3489.50, y=63.00, z=1946.03], ama['Item Frame'/515935283, l='MpServer', x=-3474.03, y=58.50, z=1947.50], amd['Painting'/515935430, l='MpServer', x=-3494.03, y=71.50, z=1945.50], ama['Item Frame'/515935284, l='MpServer', x=-3474.03, y=59.50, z=1947.50], ama['Item Frame'/515935285, l='MpServer', x=-3474.03, y=59.50, z=1944.50], ama['Item Frame'/515935286, l='MpServer', x=-3474.03, y=58.50, z=1944.50], amd['Painting'/515935288, l='MpServer', x=-3480.03, y=76.50, z=1944.50], amd['Painting'/515935289, l='MpServer', x=-3478.00, y=74.00, z=1948.97]] Retry entities: 0 total; [] Server brand: Paper Server type: Non-integrated multiplayer serverStacktrace: at crf.a(SourceFile:418) at cfs.b(SourceFile:1815) at cwp.run(SourceFile:51) at java.lang.Thread.run(Thread.java:745)
– System Details --Details: Minecraft Version: 1.13.1 Operating System: Mac OS X (x86_64) version 10.13.6 Java Version: 1.8.0_74, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 371410776 bytes (354 MB) / 637534208 bytes (608 MB) up to 2147483648 bytes (2048 MB) JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Launched Version: 1.13.1 LWJGL: 3.1.6 build 14 OpenGL: NO CONTEXT GL Caps: Using GL 1.3 multitexturing.Using GL 1.3 texture combiners.Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.Shaders are available because OpenGL 2.1 is supported.VBOs are available because OpenGL 1.5 is supported.
Using VBOs: Yes Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Resource Packs:  Current Language: English (US) Profiler Position: N/A (disabled) CPU: 4x Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz