Game always crashes

it says:"The game crashed whilst tesselating block model Error: java.lang.ArithmeticException: / by zero"

my crash report:

Minecraft Crash Report -------- Minecraft Crash Report ----// Why did you do that?
Time: 19-8-1 下午10:17Description: Tesselating block model
java.lang.ArithmeticException: / by zero at dnz.makeVertexDataSingle(BakedQuad.java:119) at dnz.getVertexDataSingle(BakedQuad.java:107) at dny.renderQuadsSmooth(BlockModelRenderer.java:237) at dny.renderModelSmooth(BlockModelRenderer.java:142) at dny.b(BlockModelRenderer.java:119) at dny.renderModel(BlockModelRenderer.java:96) at dnw.renderBlock(BlockRendererDispatcher.java:89) at dpy.b(ChunkRender.java:385) at dpv.a(SourceFile:90) at dpv.run(SourceFile:39) 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 dnz.makeVertexDataSingle(BakedQuad.java:119) at dnz.getVertexDataSingle(BakedQuad.java:107) at dny.renderQuadsSmooth(BlockModelRenderer.java:237) at dny.renderModelSmooth(BlockModelRenderer.java:142) at dny.b(BlockModelRenderer.java:119)
– Block model being tesselated --Details: Block: Block{minecraft:light_blue_stained_glass} Block location: World: (18,82,-39), Chunk: (at 2,5,9 in 1,-3; contains blocks 16,0,-48 to 31,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1) Using AO: trueStacktrace: at dny.renderModel(BlockModelRenderer.java:96)
– Block being tesselated --Details: Block: Block{minecraft:light_blue_stained_glass} Block location: World: (18,82,-39), Chunk: (at 2,5,9 in 1,-3; contains blocks 16,0,-48 to 31,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)Stacktrace: at dnw.renderBlock(BlockRendererDispatcher.java:89)
– Affected level --Details: All players: 27 total; [dmp['a_n_k_e_r'/392750, l='MpServer', x=-23.13, y=70.00, z=1.97], dmq['Hamood_ARV_'/389072, l='MpServer', x=-28.96, y=72.54, z=-4.76], dmq['Ken__Bone'/391202, l='MpServer', x=-12.69, y=67.00, z=8.72], dmq['Puddles3232'/390781, l='MpServer', x=-28.29, y=72.73, z=-5.24], dmq['SirFranks'/391438, l='MpServer', x=-5.66, y=68.50, z=-19.78], dmq['Muji0428'/387866, l='MpServer', x=-4.78, y=67.00, z=3.03], dmq['Nice_Kevin'/386392, l='MpServer', x=-11.28, y=70.03, z=2.63], dmq['vnnmr'/392747, l='MpServer', x=-4.57, y=67.38, z=1.62], dmq['PandaCan22'/391435, l='MpServer', x=-27.90, y=72.00, z=-4.75], dmq['IH4e_'/392701, l='MpServer', x=-28.19, y=70.50, z=-1.88], dmq['o9etjk3k5o'/55, l='MpServer', x=-8.50, y=67.00, z=-4.50], dmq['xElucite'/390243, l='MpServer', x=-10.06, y=67.00, z=-4.88], dmq['TIPU_'/388936, l='MpServer', x=10.50, y=72.00, z=-1.66], dmq['i171dpb9r3'/0, l='MpServer', x=3.50, y=67.00, z=-14.50], dmq['d202r1j7v3'/6, l='MpServer', x=3.50, y=68.00, z=-2.50], dmq['9h538bm262'/8, l='MpServer', x=-0.50, y=68.00, z=-8.50], dmq['6wo1754600'/9, l='MpServer', x=1.50, y=68.00, z=-5.50], dmq['7ae4e0g22b'/1, l='MpServer', x=10.50, y=67.00, z=0.50], dmq['oviees1843'/2, l='MpServer', x=1.50, y=68.00, z=6.50], dmq['7hnbh5qhj6'/4, l='MpServer', x=-0.50, y=68.00, z=9.50], dmq['4595p53c98'/7, l='MpServer', x=3.50, y=68.00, z=3.50], dmq['purplepink'/386099, l='MpServer', x=9.69, y=72.00, z=21.16], dmq['44v03t8188'/59, l='MpServer', x=15.50, y=69.00, z=17.50], dmq['Vitherdicom'/390150, l='MpServer', x=-54.63, y=93.00, z=-19.41], dmq['TrueInstinct'/391535, l='MpServer', x=-56.63, y=98.03, z=11.02], dmq['JettZyon'/392753, l='MpServer', x=-18.92, y=70.00, z=-5.46], dmq['King_Manwich'/390250, l='MpServer', x=16.73, y=68.95, z=-11.98]] Chunk stats: Client Chunk Cache: 5041, 169 Level dimension: minecraft:overworld Level name: MpServer Level seed: 0 Level generator: ID 01 - flat, ver 0. Features enabled: false Level generator options: {} Level spawn location: World: (-24,70,1), Chunk: (at 8,4,1 in -2,0; contains blocks -32,0,0 to -17,255,15), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511) Level time: 225426897 game time, 389000 day time 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 Server brand: vanilla Server type: Non-integrated multiplayer serverStacktrace: at dkf.a(ClientWorld.java:574) at cyc.b(SourceFile:1923) at dpv.run(SourceFile:45) at java.lang.Thread.run(Thread.java:745)
– System Details --Details: Minecraft Version: 1.14.4 Minecraft Version ID: 1.14.4 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 15713588592 bytes (14985 MB) / 17179869184 bytes (16384 MB) up to 17179869184 bytes (16384 MB) CPUs: 8 JVM Flags: 11 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx16G -Xms16G -Xmn6G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Launched Version: 1.14.4-OptiFine_HD_U_F2 LWJGL: 3.2.2 build 10 OpenGL: NO CONTEXT GL Caps: Using GL 1.3 multitexturing.Using GL 1.3 texture combiners.Using framebuffer objects because OpenGL 3.0 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: Very likely; Jar signature invalidated Type: Client (map_client.txt) Resource Packs: vanilla Current Language: 简体中文 (中国) CPU: 8x Intel(R) Core(TM) i7-3610QM CPU @ 2.30GHz