Plugin not working on 1.16 and 1.17

[xar55]

Server backend version

Purpur 1.16.5 build 1171

Server Velocity version

Velocity 3.2.0-SNAPSHOT build 259

VelocityVanish version

3.19.1-beta.10

Describe the bug

plugin not working (using java 11):

Could not load 'plugins/VelocityVanish-3.19.0.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: ir/syrent/velocityvanish/spigot/VelocityVanishSpigot has been compiled by a more recent version of the Java Runtime (class file version 61.0), this versio n of the Java Runtime only recognizes class file versions up to 55.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:157) ~[patched_1.16.5.jar:git-Purpur-1171]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:414) ~[patched_1.16.5.jar:git-Purpur-1171]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:322) ~[patched_1.16.5.jar:git-Purpur-1171]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:393) ~[patched_1.16.5.jar:git-Purpur-1171]
at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:279) ~[patched_1.16.5.jar:git-Purpur-1171] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1074) ~[patched_1.16.5.jar:git-Purpur-1171] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:293) ~[patched_1.16.5.jar:git-Purpur-1171]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.UnsupportedClassVersionError: ir/syrent/velocityvanish/spigot/VelocityVanishSpigot has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only reco gnizes class file versions up to 55.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?]
at java.lang.ClassLoader.defineClass(ClassLoader.java:1017) ~[?:?]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:201) ~[patched_1.16.5.jar:git-Purpur-1171]
at java.lang.ClassLoader.loadClass(ClassLoader.java:589) ~[?:?]
luginClassLoader.java:119) ~[patched_1.16.5.jar:git-Purpur-1171]
at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:114) ~[patched_1.16.5.jar:git-Purpur-1171]
at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:?]
at java.lang.Class.forName(Class.java:398) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.(PluginClassLoader.java:82) ~[patched_1.16.5.jar:git-Purpur-1171]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:153) ~[patched_1.16.5.jar:git-Purpur-1171]
... 7 more

Expected behavior

plugin working

Steps to reproduce

1. use same server versions as me

Additional info

also tried older plugin versions but no luck

Checklist

• [X] I am running latest version of the plugin on both Velocity and Spigot
• [x] I have read the wiki to make sure it's not an issue with configuration
• [ ] I ticked all of the boxes without actually reading them