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So I have this problem, where whenever I join a certain server my minecraft crashes. My complete log is shown below. All help will be appreciatied (Server has custom resource pack that I have disabled)

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 7/10/17 11:41 AM
Description: Tesselating block model

java.lang.NullPointerException: Tesselating block model
at atp.a(SourceFile:345)
at aws$a.d(BlockStateContainer.java:530)
at aum.b(SourceFile:150)
at aum.d(SourceFile:116)
at aws$a.c(BlockStateContainer.java:427)
at ConnectedTextures.skipConnectedTexture(ConnectedTextures.java:147)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:105)
at BlockModelCustomizer.getRenderQuads(BlockModelCustomizer.java:89)
at BlockModelCustomizer.getRenderQuads(BlockModelCustomizer.java:60)
at bvm.c(BlockModelRenderer.java:156)
at bvm.a(BlockModelRenderer.java:74)
at bvm.a(BlockModelRenderer.java:54)
at bvk.a(SourceFile:65)
at bxp.b(RenderChunk.java:296)
at bxl.a(ChunkRenderWorker.java:119)
at bxl.run(ChunkRenderWorker.java:47)
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 thread
Stacktrace:
at atp.a(SourceFile:345)
at aws$a.d(BlockStateContainer.java:530)
at aum.b(SourceFile:150)
at aum.d(SourceFile:116)
at aws$a.c(BlockStateContainer.java:427)
at ConnectedTextures.skipConnectedTexture(ConnectedTextures.java:147)
at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:105)
at BlockModelCustomizer.getRenderQuads(BlockModelCustomizer.java:89)
at BlockModelCustomizer.getRenderQuads(BlockModelCustomizer.java:60)
at bvm.c(BlockModelRenderer.java:156)

-- Block model being tesselated --
Details:
Block: minecraft:stained_glass_pane
Block location: World: (-465,74,683), Chunk: (at 15,4,11 in -30,42; contains blocks -480,0,672 to -465,255,687), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
Using AO: false
Stacktrace:
at bvm.a(BlockModelRenderer.java:74)
at bvm.a(BlockModelRenderer.java:54)

-- Block being tesselated --
Details:
Block type: ID #160 (tile.thinStainedGlass // atz)
Block data value: 15 / 0xF / 0b1111
Block location: World: (-465,74,683), Chunk: (at 15,4,11 in -30,42; contains blocks -480,0,672 to -465,255,687), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
Stacktrace:
at bvk.a(SourceFile:65)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bub['stickymohawk'/2559, l='MpServer', x=-447.48, y=69.00, z=721.50]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-387,73,700), Chunk: (at 13,4,12 in -25,43; contains blocks -400,0,688 to -385,255,703), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
Level time: 39319308 game time, 13677336 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: 8 total; [bub['stickymohawk'/2559, l='MpServer', x=-447.48, y=69.00, z=721.50], abz['entity.ItemFrame.name'/48, l='MpServer', x=-469.50, y=71.50, z=726.03], abz['entity.ItemFrame.name'/49, l='MpServer', x=-468.50, y=71.50, z=726.03], abz['entity.ItemFrame.name'/50, l='MpServer', x=-466.50, y=71.50, z=726.03], abz['entity.ItemFrame.name'/51, l='MpServer', x=-465.50, y=71.50, z=726.03], abz['entity.ItemFrame.name'/52, l='MpServer', x=-464.50, y=71.50, z=726.03], abz['entity.ItemFrame.name'/53, l='MpServer', x=-467.50, y=71.50, z=726.03], abz['entity.ItemFrame.name'/54, l='MpServer', x=-463.50, y=71.50, z=726.03]]
Retry entities: 0 total; []
Server brand: Spigot
Server type: Non-integrated multiplayer server
Stacktrace:
at brz.a(WorldClient.java:524)
at bhz.b(SourceFile:2587)
at bxl.run(ChunkRenderWorker.java:57)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.12
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 89138304 bytes (85 MB) / 308895744 bytes (294 MB) up to 523501568 bytes (499 MB)
JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -Xmx512M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 99
Launched Version: 1.12-OptiFine_HD_U_C4
LWJGL: 2.9.4
OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
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: PortVanceOfficial.zip
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
OptiFine Version: OptiFine_1.12_HD_U_C4
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.5.13399 Compatibility Profile Context 15.201.1151.1008
OpenGlRenderer: AMD Radeon HD 5670
OpenGlVendor: ATI Technologies Inc.
CpuCount: 8