Running plugin on minecraft server version 1.8.8

I am trying to run a minecraft server for me and a couple of friends to play on. We all want to take a trip down memory lane and play minecraft version 1.8.8. To do this I had to run a command in the docker container to use java 8 instead of java 17 which is used for the newest versions of minecraft, I added the plugin anyways and this appeared in my logs:

Could not load ‘plugins/playit-minecraft-plugin.jar’ in folder ‘plugins’
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: gg/playit/minecraft/PlayitBukkit has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[patched_1.8.8.jar:git-PaperSpigot-445]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:331) ~[patched_1.8.8.jar:git-PaperSpigot-445]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:254) [patched_1.8.8.jar:git-PaperSpigot-445]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:293) [patched_1.8.8.jar:git-PaperSpigot-445]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:202) [patched_1.8.8.jar:git-PaperSpigot-445]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563) [patched_1.8.8.jar:git-PaperSpigot-445]
at java.lang.Thread.run(Thread.java:750) [?:1.8.0_392]
Caused by: java.lang.UnsupportedClassVersionError: gg/playit/minecraft/PlayitBukkit has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_392]
at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[?:1.8.0_392]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_392]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:473) ~[?:1.8.0_392]
at java.net.URLClassLoader.access$100(URLClassLoader.java:74) ~[?:1.8.0_392]
at java.net.URLClassLoader$1.run(URLClassLoader.java:369) ~[?:1.8.0_392]
at java.net.URLClassLoader$1.run(URLClassLoader.java:363) ~[?:1.8.0_392]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_392]
at java.net.URLClassLoader.findClass(URLClassLoader.java:362) ~[?:1.8.0_392]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:102) ~[patched_1.8.8.jar:git-PaperSpigot-445]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:87) ~[patched_1.8.8.jar:git-PaperSpigot-445]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_392]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_392]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_392]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_392]
at org.bukkit.plugin.java.PluginClassLoader.(PluginClassLoader.java:65) ~[patched_1.8.8.jar:git-PaperSpigot-445]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[patched_1.8.8.jar:git-PaperSpigot-445]
… 6 more

Are there any old downloads that will support java 8 or am I completely SOL?

The server plugin is intended for newer versions of Bukkit and therefore Java. I would recommend using regular playit.