Using a mac and want to upgrade my minecraft world to 20w17a, however when I go to optimise world, it crashes and comes up with this crash report:

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Quite honestly, I wouldn't worry myself about that.
Time: 24/04/20 1:23 PMDescription: mouseClicked event handler
java.lang.NullPointerException: mouseClicked event handler at dsu.<init>(SourceFile:38) at dsu.a(SourceFile:32) at dst.a(SourceFile:80) at dog.b(SourceFile:40) at dmc.as_(SourceFile:20) at dlw.a(SourceFile:16) at dma.a(SourceFile:150) at dmz.a(SourceFile:27) at dks.b(SourceFile:86) at dpj.a(SourceFile:416) at dks.a(SourceFile:86) at dks.c(SourceFile:150) at alp.execute(SourceFile:94) at dks.b(SourceFile:150) at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) at org.lwjgl.system.JNI.invokeV(Native Method) at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3129) at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:123) at dkr.e(SourceFile:1030) at dkr.d(SourceFile:630) at net.minecraft.client.main.Main.main(SourceFile:204)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Render threadStacktrace: at dsu.<init>(SourceFile:38) at dsu.a(SourceFile:32) at dst.a(SourceFile:80) at dog.b(SourceFile:40) at dmc.as_(SourceFile:20) at dlw.a(SourceFile:16) at dma.a(SourceFile:150) at dmz.a(SourceFile:27) at dks.b(SourceFile:86)
– Affected screen --Details: Screen name: dogStacktrace: at dpj.a(SourceFile:416) at dks.a(SourceFile:86) at dks.c(SourceFile:150) at alp.execute(SourceFile:94) at dks.b(SourceFile:150) at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) at org.lwjgl.system.JNI.invokeV(Native Method) at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3129) at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:123) at dkr.e(SourceFile:1030) at dkr.d(SourceFile:630) at net.minecraft.client.main.Main.main(SourceFile:204)
– System Details --Details: Minecraft Version: 20w17a Minecraft Version ID: 20w17a Operating System: Mac OS X (x86_64) version 10.15.4 Java Version: 1.8.0_74, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1671547672 bytes (1594 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB) CPUs: 4 JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Launched Version: 20w17a Backend library: LWJGL version 3.2.1 build 12 Backend API: Intel(R) HD Graphics 6000 GL version 2.1 INTEL-14.5.22, Intel Inc. GL Caps: Using framebuffer using ARB_framebuffer_object extension Using VBOs: Yes Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Resource Packs: vanilla Current Language: English (New Zealand) CPU: 4x Intel(R) Core(TM) i5-5350U CPU @ 1.80GHz

This means my minecraft cannot be updated to 20w17a...