[18:37:40 WARN]: Initializing Legacy Material Support. Unless you have legacy plugins and/or data this is a bug!
[18:37:43 WARN]: Legacy plugin NoDamageIndicator v1.0 does not specify an api-version.
[18:37:43 ERROR]: Could not load 'plugins\NoDamageIndicator-1.0.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/crston/minecraft/nodamageindicator/main has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:141) ~[patched_1.16.5.jar:git-Paper-507]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:397) ~[patched_1.16.5.jar:git-Paper-507]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:305) ~[patched_1.16.5.jar:git-Paper-507]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:389) ~[patched_1.16.5.jar:git-Paper-507]
        at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:206) ~[patched_1.16.5.jar:git-Paper-507]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:941) ~[patched_1.16.5.jar:git-Paper-507]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:175) ~[patched_1.16.5.jar:git-Paper-507]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_281]