I'm not sure what post logs means but I looked through the crash reports and it mentions a few times about a frame buffer. Here's the full thing, although I'm not 100% sure it's the right one.
---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.
Time: 5/7/20 4:16 PM
Description: Initializing game
java.lang.RuntimeException: GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT
at net.minecraft.client.shader.Framebuffer.func_147611_b(SourceFile:146) ~[?:?] {re:classloading}
at net.minecraft.client.shader.Framebuffer.func_216492_b(SourceFile:123) ~[?:?] {re:classloading}
at net.minecraft.client.shader.Framebuffer.func_227586_d_(SourceFile:65) ~[?:?] {re:classloading}
at net.minecraft.client.shader.Framebuffer.func_216491_a(SourceFile:54) ~[?:?] {re:classloading}
at net.minecraft.client.shader.Framebuffer.<init>(SourceFile:45) ~[?:?] {re:classloading}
at net.minecraft.client.Minecraft.<init>(Minecraft.java:389) [?:?] {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(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) [forge-1.15.2-31.1.76.jar:31.1] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$423/1897368146.call(Unknown Source) [forge-1.15.2-31.1.76.jar:31.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.1.0.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.1.0.jar:?] {}
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.client.shader.Framebuffer.func_147611_b(SourceFile:146)
at net.minecraft.client.shader.Framebuffer.func_216492_b(SourceFile:123)
at net.minecraft.client.shader.Framebuffer.func_227586_d_(SourceFile:65)
at net.minecraft.client.shader.Framebuffer.func_216491_a(SourceFile:54)
at net.minecraft.client.shader.Framebuffer.<init>(SourceFile:45)
at net.minecraft.client.Minecraft.<init>(Minecraft.java:389)
-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.main.Main.main(SourceFile:166)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56)
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$423/1897368146.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)
-- System Details --
Details:
Minecraft Version: 1.15.2
Minecraft Version ID: 1.15.2
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: 737837048 bytes (703 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
CPUs: 12
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Launched Version: 1.15.2-forge-31.1.76
Backend library: LWJGL version 3.2.2 build 10
Backend API: Radeon RX 580 Series GL version 4.6.13572 Compatibility Profile Context 19.11.1 26.20.13031.10003, ATI Technologies Inc.
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'forge'
Type: Client (map_client.txt)
CPU: 12x AMD Ryzen 5 3600 6-Core Processor