---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 7/26/18 10:41 PM
Description: Exception in server tick loop

i: Non [a-z0-9_.-] character in namespace of location: #minecraft:saplings
	at pc.<init>(SourceFile:35)
	at pc.<init>(SourceFile:43)
	at avd.a(SourceFile:160)
	at avd.a(SourceFile:143)
	at avm$a.a(SourceFile:106)
	at avm$a.b(SourceFile:91)
	at avm$a.a(SourceFile:87)
	at avj.a(SourceFile:49)
	at avh.a(SourceFile:52)
	at vg.c(SourceFile:123)
	at vg.a(SourceFile:106)
	at net.minecraft.server.MinecraftServer.a(SourceFile:1393)
	at net.minecraft.server.MinecraftServer.a(SourceFile:391)
	at dfx.a(SourceFile:84)
	at dfx.d(SourceFile:134)
	at net.minecraft.server.MinecraftServer.run(SourceFile:541)
	at java.lang.Thread.run(Thread.java:745)


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

-- System Details --
Details:
	Minecraft Version: 1.13
	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: 196464968 bytes (187 MB) / 553648128 bytes (528 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla, file/custom_crafting (incompatible)
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.