00:09:34] [Server thread/ERROR]: Could not load 'plugins/[??????]EasyClearDrop.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
        at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:158) ~[paperspigot-1.12.2.jar:git-Paper-1537]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:136) ~[paperspigot-1.12.2.jar:git-Paper-1537]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:318) ~[paperspigot-1.12.2.jar:git-Paper-1537]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:222) ~[paperspigot-1.12.2.jar:git-Paper-1537]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) ~[paperspigot-1.12.2.jar:git-Paper-1537]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]
Caused by: java.io.FileNotFoundException: plugins/[??????]EasyClearDrop.jar (No such file or directory)
        at java.util.zip.ZipFile.open(Native Method) ~[?:1.8.0_171]
        at java.util.zip.ZipFile.<init>(ZipFile.java:225) ~[?:1.8.0_171]
        at java.util.zip.ZipFile.<init>(ZipFile.java:155) ~[?:1.8.0_171]
        at java.util.jar.JarFile.<init>(JarFile.java:166) ~[?:1.8.0_171]
        at java.util.jar.JarFile.<init>(JarFile.java:130) ~[?:1.8.0_171]
        at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:146) ~[paperspigot-1.12.2.jar:git-Paper-1537]
        ... 5 more

插件可能损坏了 或者把[??????]EasyClearDrop.jar改为EasyClearDrop.jar

检查一下你的EasyClearDrop.jar插件版本对不对，如果版本没问题，检查一下是不是需要前置插件。

你的插件文件名里有中文，把插件名称改成EasyClearDrop.jar也就是去掉头上的中文就好了