WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by me.lucko.luckperms.common.dependencies.classloader.ReflectionClassLoader (file:/C:/Users/KendallCraft/Desktop/1.15.2%20Server/plugins/LuckPerms-Bukkit-5.1.26.jar) to method java.net.URLClassLoader.addURL(java.net.URL)
WARNING: Please consider reporting this to the maintainers of me.lucko.luckperms.common.dependencies.classloader.ReflectionClassLoader
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
I mean it literally tells you...
It is safe to ignore any warning printed following this message
This is intended, and will not have any impact on the operation of LuckPerms
It also said to consider reporting it, so I did.