I have been receiving crashes constantly in my minecraft, however it has only started about a week ago and now it's getting more frequent and annoying.

[20:47:41] [Client thread/INFO]: Setting user: Ivuny[20:47:42] [Client thread/INFO]: LWJGL Version: 3.1.6 build 14[20:47:44] [Client thread/INFO]: Reloading ResourceManager: Default[20:47:44] [Sound Library Loader/INFO]: Starting up SoundSystem...[20:47:44] [Thread-2/INFO]: Initializing No Sound[20:47:44] [Thread-2/INFO]: (Silent Mode)[20:47:45] [Thread-2/INFO]: OpenAL initialized.[20:47:45] [Sound Library Loader/INFO]: Preloading sound minecraft:sounds/ambient/underwater/underwater_ambience.ogg[20:47:45] [Sound Library Loader/INFO]: Sound engine started[20:47:47] [Client thread/INFO]: Created: 1024x512 textures-atlas[20:47:49] [Client thread/INFO]: Narrator library for x64 successfully loaded[20:48:00] [Client thread/ERROR]: Invalid icon for server Minecraft Server (play.fuscraft.net)java.lang.IllegalArgumentException: Illegal base64 character a at java.util.Base64$Decoder.decode0(Base64.java:714) ~[?:1.8.0_51] at java.util.Base64$Decoder.decode(Base64.java:623) ~[?:1.8.0_51] at clp.g(SourceFile:212) [1.13.jar:?] at clp.a(SourceFile:144) [1.13.jar:?] at cgv.a(SourceFile:35) [1.13.jar:?] at cha.a(SourceFile:391) [1.13.jar:?] at cha.a(SourceFile:194) [1.13.jar:?] at clm.a(SourceFile:310) [1.13.jar:?] at ctn.a(SourceFile:792) [1.13.jar:?] at cfi.c(SourceFile:847) [1.13.jar:?] at cfi.a(SourceFile:392) [1.13.jar:?] at net.minecraft.client.main.Main.main(SourceFile:144) [1.13.jar:?][20:48:02] [Client thread/ERROR]: Invalid icon for server Minecraft Server (valius.mcph.co)java.lang.IllegalArgumentException: Illegal base64 character a at java.util.Base64$Decoder.decode0(Base64.java:714) ~[?:1.8.0_51] at java.util.Base64$Decoder.decode(Base64.java:623) ~[?:1.8.0_51] at clp.g(SourceFile:212) [1.13.jar:?] at clp.a(SourceFile:144) [1.13.jar:?] at cgv.a(SourceFile:35) [1.13.jar:?] at cha.a(SourceFile:391) [1.13.jar:?] at cha.a(SourceFile:194) [1.13.jar:?] at clm.a(SourceFile:310) [1.13.jar:?] at ctn.a(SourceFile:792) [1.13.jar:?] at cfi.c(SourceFile:847) [1.13.jar:?] at cfi.a(SourceFile:392) [1.13.jar:?] at net.minecraft.client.main.Main.main(SourceFile:144) [1.13.jar:?][20:48:04] [Client thread/INFO]: Connecting to play.sunken.net, 25565