Paper: 26 ram and when i pre generating world i got this error and server shutdown

[a7ssan]

java.lang.Throwable: null
at co.aikar.timings.TimingHandler.popTimingStack(TimingHandler.java:135) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at co.aikar.timings.TimingHandler.stopTiming(TimingHandler.java:117) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at co.aikar.timings.TimingHandler.stopTimingIfSync(TimingHandler.java:96) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at co.aikar.timings.TimingHandler.close(TimingHandler.java:203) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:88) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:452) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1275) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:467) ~[BeeSpigot.jar:git-Purpur-d02efdf] at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1193) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:980) ~[BeeSpigot.jar:git-Purpur-d02efdf]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_251]

Discord: Hassan™#1178

Paper build number:

git-Purpur-d02efdf (MC: 1.15.2)

[MiniDigger]

Paper build number:
git-Purpur-d02efdf (MC: 1.15.2)
~[BeeSpigot.jar:git-Purpur-d02efdf

Either reproduce using paper or report to purpur/whatever beespigot is

Edit: it's a 25usd mcm version, lmao.
Imagine paying for free and open source software