[ 16 : 41 : 56 ERROR ] : [Minecraft ] Could not load 'plugins/ShulkerboxPreview.jar' in folder 'plugins'
org. bukkit. plugin. InvalidPluginException : Unsupported API version 1.17
at org. bukkit. craftbukkit. v1_16_R3. util. CraftMagicNumbers. checkSupported (CraftMagicNumbers. java : 361 ) ~ [patched_1.16.5. jar :git -Purpur - 1171 ]
at org. bukkit. plugin. java. JavaPluginLoader. loadPlugin (JavaPluginLoader. java : 149 ) ~ [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 : 834 ) [ ?:? ]