console spamming erros
https://paste.ofcode.org/CXT3YGUkiRJtmnnTQLuugH
i dont remember were i did download from:
SimpleClans v2.7.11
maybe on jekins but is off line for ever
http://104.236.246.108:8080/job/SimpleClans/
On Bukkit there is only old builds:
https://dev.bukkit.org/projects/simpleclans/files
On Spigot the same:
https://www.spigotmc.org/resources/simpleclans.5269/

I just found out that this error only occurs with a specific player when that player types any message in the chat, whether in global chat, responding private message, or in local chat, the error occurs, there are 20 players on the clan server and none of them typing makes the mistake happen. If that specific player leaves the clan the error also does not occur. However if he is invited to any other clan the error reappears on the console. Any tips?

i Solve this Issue, editing database and removing corrupted player table from the file.