Computer forced an update, world I was playing on crashes when trying to load. This is the only world that crashes, all others work fine.

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Oh - I know what I did wrong!
Time: 8/7/18 1:04 PMDescription: Ticking memory connection
java.lang.IllegalStateException: Not a JSON Object: null at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90) at wn.a(SourceFile:82) at wn.<init>(SourceFile:48) at vo.a(SourceFile:915) at te.<init>(SourceFile:159) at vo.g(SourceFile:442) at ud.b(SourceFile:113) at ud.Y_(SourceFile:65) at hw.a(SourceFile:238) at ua.c(SourceFile:171) at net.minecraft.server.MinecraftServer.w(SourceFile:749) at net.minecraft.server.MinecraftServer.v(SourceFile:656) at dfx.v(SourceFile:157) at net.minecraft.server.MinecraftServer.run(SourceFile:559) at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
-- Head --Thread: Server threadStacktrace: at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90) at wn.a(SourceFile:82) at wn.<init>(SourceFile:48) at vo.a(SourceFile:915) at te.<init>(SourceFile:159) at vo.g(SourceFile:442) at ud.b(SourceFile:113) at ud.Y_(SourceFile:65) at hw.a(SourceFile:238)
-- Ticking connection --Details: Connection: hw@4ee09116Stacktrace: at ua.c(SourceFile:171) at net.minecraft.server.MinecraftServer.w(SourceFile:749) at net.minecraft.server.MinecraftServer.v(SourceFile:656) at dfx.v(SourceFile:157) at net.minecraft.server.MinecraftServer.run(SourceFile:559) at java.lang.Thread.run(Thread.java:745)
-- 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: 189184104 bytes (180 MB) / 570425344 bytes (544 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 Type: Integrated Server (map_client.txt) Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.