This was the error

java.lang.IllegalStateException: Could not load icon: Image not of any known type, or corruptjava.lang.IllegalStateException: Could not load icon: Image not of any known type, or corrupt at net.minecraft.client.MainWindow.func_216529_a(SourceFile:160) ~[?:?] {re:classloading} at net.minecraft.client.Minecraft.<init>(Minecraft.java:380) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.main.Main.main(SourceFile:166) [?:?] {re:classloading} at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51] {} at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51] {} at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51] {} at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) [forge-1.15.2-31.1.0.jar:31.1] {} at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$386/1057569470.call(Unknown Source) [forge-1.15.2-31.1.0.jar:31.1] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {} at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {} at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51] {} at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51] {} at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51] {} at net.minecraft.a.m.main(Unknown Source) [laulib-1.0.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Render threadStacktrace: at net.minecraft.client.MainWindow.func_216529_a(SourceFile:160) at net.minecraft.client.Minecraft.<init>(Minecraft.java:380)
– Initialization --Details:Stacktrace: at net.minecraft.client.main.Main.main(SourceFile:166) 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.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$386/1057569470.call(Unknown Source) at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) 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.a.m.main(Unknown Source)
– System Details --Details: Minecraft Version: 1.15.2 Minecraft Version ID: 1.15.2 Operating System: Windows 8.1 (amd64) version 6.3 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1682638176 bytes (1604 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB) CPUs: 12 JVM Flags: 9 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M -XX:+IgnoreUnrecognizedVMOptions -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump Launched Version: 1.15.2-forge-31.1.0 Backend library: LWJGL version 3.2.2 build 10 Backend API: GeForce RTX 2070 SUPER/PCIe/SSE2 GL version 4.6.0 NVIDIA 445.87, NVIDIA Corporation GL Caps:  Using VBOs: Yes Is Modded: Definitely; Client brand changed to 'forge' Type: Client (map_client.txt) CPU: <unknown>