I get these warnings when starting my server with LuckPerms and Vault.
Vault loads, LuckPerms doesn't:

[09:29:03 WARN]: org.bukkit.plugin.InvalidPluginException: org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
[09:29:03 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:76)
[09:29:03 WARN]: at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329)
[09:29:03 WARN]: at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:356)
[09:29:03 WARN]: at com.rylinaux.plugman.command.LoadCommand.execute(LoadCommand.java:114)
[09:29:03 WARN]: at com.rylinaux.plugman.PlugManCommandHandler.onCommand(PlugManCommandHandler.java:95)
[09:29:03 WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[09:29:03 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:151)
[09:29:03 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:674)
[09:29:03 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:637)
[09:29:03 WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:464)
[09:29:03 WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:427)
[09:29:03 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:767)
[09:29:03 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:665)
[09:29:03 WARN]: at java.lang.Thread.run(Thread.java:748)
[09:29:03 WARN]: Caused by: org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
[09:29:03 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:158)
[09:29:03 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:74)
[09:29:03 WARN]: ... 13 more
[09:29:03 WARN]: Caused by: java.util.zip.ZipException: error in opening zip file
[09:29:03 WARN]: at java.util.zip.ZipFile.open(Native Method)
[09:29:03 WARN]: at java.util.zip.ZipFile.(ZipFile.java:225)
[09:29:03 WARN]: at java.util.zip.ZipFile.(ZipFile.java:155)
[09:29:03 WARN]: at java.util.jar.JarFile.(JarFile.java:166)
[09:29:03 WARN]: at java.util.jar.JarFile.(JarFile.java:130)
[09:29:03 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:146)
[09:29:03 WARN]: ... 14 more

Don't use plugman.

@lucko I'm using PlugMan to see if I can get your plugin to work, I've got this problem also before installing PlugMan. Anyways it still doesn't work now that I removed PlugMan.

Can you show me the new error?

[11:09:27 ERROR]: Could not load 'plugins/LuckPerms.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:158) ~[PaperSpigot-latest.jar:git-Paper-1270]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:136) [PaperSpigot-latest.jar:git-Paper-1270]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:307) [PaperSpigot-latest.jar:git-Paper-1270]
at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:225) [PaperSpigot-latest.jar:git-Paper-1270]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) [PaperSpigot-latest.jar:git-Paper-1270]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method) ~[?:1.8.0_151]
at java.util.zip.ZipFile.(ZipFile.java:225) ~[?:1.8.0_151]
at java.util.zip.ZipFile.(ZipFile.java:155) ~[?:1.8.0_151]
at java.util.jar.JarFile.(JarFile.java:166) ~[?:1.8.0_151]
at java.util.jar.JarFile.(JarFile.java:130) ~[?:1.8.0_151]
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:146) ~[PaperSpigot-latest.jar:git-Paper-1270]
... 5 more

@lucko

Working now, thank you so much @lucko.

Can you try downloading a fresh jar from https://ci.lucko.me/job/LuckPerms/

Seems like the copy you have has been corrupted in some way.