I was using a creation by Tryashtar, (link below) and then My game crashed when looking at an edited shulker box.

Link: https://www.youtube.com/watch?v=lZP-qnDFz5k

Crash Report:

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Sorry :(
Time: 3/19/19 9:23 AMDescription: Rendering screen
java.lang.IllegalStateException: Image is not allocated. at cse.g(SourceFile:143) at cse.a(SourceFile:325) at cse.a(SourceFile:320) at cse.a(SourceFile:316) at dsr.a(SourceFile:31) at dsr.<init>(SourceFile:16) at dtw.a(SourceFile:50) at dbh.b(SourceFile:48) at dbh.a(SourceFile:77) at cvd.a(SourceFile:34) at cvh.a(SourceFile:410) at cvh.a(SourceFile:193) at dbg.a(SourceFile:121) at djc.a(SourceFile:688) at ctp.d(SourceFile:970) at ctp.b(SourceFile:413) at net.minecraft.client.main.Main.main(SourceFile:154)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Client threadStacktrace: at cse.g(SourceFile:143) at cse.a(SourceFile:325) at cse.a(SourceFile:320) at cse.a(SourceFile:316) at dsr.a(SourceFile:31) at dsr.<init>(SourceFile:16) at dtw.a(SourceFile:50) at dbh.b(SourceFile:48) at dbh.a(SourceFile:77) at cvd.a(SourceFile:34) at cvh.a(SourceFile:410) at cvh.a(SourceFile:193) at dbg.a(SourceFile:121)
– Screen render details --Details: Screen name: dbg Mouse location: Scaled: (178, 164). Absolute: (357.000000, 328.000000) Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2.000000
– Affected level --Details: Level name: MpServer All players: 1 total; [dip['Creeper_Juice0'/440, l='MpServer', x=-252.11, y=5.00, z=19.59]] Chunk stats: MultiplayerChunkCache: 289, 289 Level seed: 0 Level generator: ID 01 - flat, ver 0. Features enabled: false Level generator options: {} Level spawn location: World: (-208,4,0), Chunk: (at 0,0,0 in -13,0; contains blocks -208,0,0 to -193,255,15), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511) Level time: 3875712 game time, 13000 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: creative (ID 1). Hardcore: false. Cheats: false Server brand: vanilla Server type: Non-integrated multiplayer serverStacktrace: at dgf.a(SourceFile:447) at ctp.b(SourceFile:1936) at ctp.b(SourceFile:421) at net.minecraft.client.main.Main.main(SourceFile:154)
– System Details --Details: Minecraft Version: 19w11b 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: 182266608 bytes (173 MB) / 551133184 bytes (525 MB) up to 5355339776 bytes (5107 MB) JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx5G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M Launched Version: 19w11b LWJGL: 3.2.1 build 12 OpenGL: Intel(R) HD Graphics 5500 GL version 4.4.0 - Build 20.19.15.4642, Intel 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: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Resource Packs: vanilla, file/Better Minecraft Current Language: English (US) CPU: 4x Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz