Minecraft crashes when I open it

 My Minecraft keeps crashing whenever I try to open it, this is the report which it displays.

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Failed to start game
This error has been saved to C:\Users\keiko\AppData\Roaming\.minecraft\crash-reports\crash-2019-06-09_21.12.28-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

— BEGIN ERROR REPORT 231457b9 --------
Generated 09/06/19 21:12

• Minecraft Version: 1.4.2
• 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: 87706624 bytes (83 MB) / 134217728 bytes (128 MB) up to 2147483648 bytes (2048 MB)
• JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
• AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
• LWJGL: 2.9.0
• OpenGL: AMD Radeon(TM) R7 Graphics GL version 4.5.13401 Compatibility Profile Context 15.201.1301.0, ATI Technologies Inc.
• Is Modded: Very likely
• Type: Client
• Texture Pack: Default
• Profiler Position: N/A (disabled)
• Vec3 Pool Size: _ERROR NullPointerException: null

java.lang.NullPointerException
at java.io.Reader.<init>(Reader.java:78)
at java.io.InputStreamReader.<init>(InputStreamReader.java:97)
at be.a(SourceFile:56)
at be.a(SourceFile:91)
at net.minecraft.client.Minecraft.a(SourceFile:249)
at net.minecraft.client.Minecraft.run(SourceFile:515)
at java.lang.Thread.run(Thread.java:745)
— END ERROR REPORT bec19d62 ----------