It looks like don't support 1.17.1 PaperMC#403 it crashed, I use java 17 openjdk:

[19:10:38 ERROR]: Could not load 'plugins/NoBoom-1.2.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Unsupported API version 1.18
at org.bukkit.craftbukkit.v1_17_R1.util.CraftMagicNumbers.checkSupported(CraftMagicNumbers.java:358) ~[patched_1.17.1.jar:git-Paper-402]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:149) ~[patched_1.17.1.jar:git-Paper-402]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:414) ~[patched_1.17.1.jar:git-Paper-402]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:322) ~[patched_1.17.1.jar:git-Paper-402]
at org.bukkit.craftbukkit.v1_17_R1.CraftServer.loadPlugins(CraftServer.java:419) ~[patched_1.17.1.jar:git-Paper-402]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:287) ~[patched_1.17.1.jar:git-Paper-402]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1220) ~[patched_1.17.1.jar:git-Paper-402]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[patched_1.17.1.jar:git-Paper-402]
at java.lang.Thread.run(Thread.java:833) ~[?:?]

Seems to be working fine for 1.17 using PaperMC#46, love the simplicity compared to the alternatives.

Does what it claims to do, and what's better, it's dead simple. Just drop it into your plugin folder, restart the server, and bing bada boom, it works.

Only suggestion is to keep the creeper's explosion. Currently, the explosion graphics is suppressed. It would be nicer if the explosion were still there, but just didn't harm blocks.

Great plugin, super simple and easy (Paper 1.16.4) A little suggestion, it would be nice to see the creeper make the explosion effect. Since as of now it just disappears when it tries to blow itself up. Great work and thank you!

Very easy to drag and drop into the plugin folder, does exactly what it promises, thank you! :) (paper 1.16.3)