Client crash

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 25.08.19 15:18
Description: Updating screen events

java.lang.NoClassDefFoundError: io/netty/bootstrap/ServerBootstrap
	at net.minecraft.network.NetworkSystem.func_151270_a(NetworkSystem.java:107)
	at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2136)
	at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:230)
	at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:225)
	at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:377)
	at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:296)
	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1640)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: io.netty.bootstrap.ServerBootstrap
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 17 more
Caused by: java.lang.OutOfMemoryError: Java heap space


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at net.minecraft.network.NetworkSystem.func_151270_a(NetworkSystem.java:107)
	at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2136)
	at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:230)
	at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:225)
	at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:377)
	at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:296)
	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)

-- Affected screen --
Details:
	Screen name: net.minecraft.client.gui.GuiMainMenu
Stacktrace:
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1640)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
	Minecraft Version: 1.7.10
	Operating System: Windows 10 (x86) version 10.0
	Java Version: 1.8.0_211, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 8712 bytes (0 MB) / 523501568 bytes (499 MB) up to 523501568 bytes (499 MB)
	JVM Flags: 8 total; -Xmx3G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -Xmx512m -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 15, tallocated: 95
	FML: ~~ERROR~~ OutOfMemoryError: Java heap space
	GL info: ' Vendor: 'Intel' Version: '4.5.0 - Build 24.20.100.6286' Renderer: 'Intel(R) HD Graphics 620'
	OpenModsLib class transformers: [stencil_patches:FINISHED],[movement_callback:FINISHED],[player_damage_hook:FINISHED],[map_gen_fix:FINISHED],[gl_capabilities_hook:FINISHED],[player_render_hook:FINISHED]
	Class transformer null safety: all safe
	AE2 Version: beta rv3-beta-6 for Forge 10.13.4.1448
	Mantle Environment: Environment healthy.
	TConstruct Environment: Environment healthy.
	Stencil buffer state: Function set: GL30, pool: internal, bits: 8
	AE2 Integration: IC2:ON, RotaryCraft:OFF, RC:OFF, BuildCraftCore:ON, BuildCraftTransport:ON, BuildCraftBuilder:ON, RF:ON, RFItem:ON, MFR:OFF, DSU:ON, FZ:OFF, FMP:ON, RB:OFF, CLApi:OFF, Waila:ON, InvTweaks:OFF, NEI:ON, CraftGuide:ON, Mekanism:ON, ImmibisMicroblocks:OFF, BetterStorage:OFF, OpenComputers:OFF, PneumaticCraft:OFF
	Launched Version: 1.7.10-Forge10.13.4.1614-1.7.10
	LWJGL: 2.9.1
	OpenGL: Intel(R) HD Graphics 620 GL version 4.5.0 - Build 24.20.100.6286, Intel
	GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Definitely; Client brand changed to 'fml,forge'
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)