[15:16:06] [Server thread/ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'BankTeller-1.0-SNAPSHOT.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Unsupported API version 1.21
at org.bukkit.craftbukkit.v1_20_R1.util.CraftMagicNumbers.checkSupported(CraftMagicNumbers.java:380) ~[paper-1.20.1.jar:git-Paper-196]
at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:119) ~[paper-1.20.1.jar:git-Paper-196]
at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:35) ~[paper-1.20.1.jar:git-Paper-196]
at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[paper-1.20.1.jar:git-Paper-196]
at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[paper-1.20.1.jar:git-Paper-196]
at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) ~[paper-1.20.1.jar:git-Paper-196]
at org.bukkit.craftbukkit.v1_20_R1.CraftServer.loadPlugins(CraftServer.java:510) ~[paper-1.20.1.jar:git-Paper-196]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:273) ~[paper-1.20.1.jar:git-Paper-196]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1100) ~[paper-1.20.1.jar:git-Paper-196]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:317) ~[paper-1.20.1.jar:git-Paper-196]
at java.lang.Thread.run(Thread.java:1583) ~[?:?]
running verison 1.0 beta on paper 1.20.1-196
simple api support needed for paper, great plugin