Dear Moderators, I'm having problems about my server called GengarSMP. It's simply about Anarchy and Box, but whenever I join my server, an error popped up, called "Internal Server Error". I kept rejoining the server, restarting my server, and even restarted my phone, but it seems nothing really work. I posted a YouTube video about the problem so that you can gather more information. Please fix this, thanks.
YouTube Link:
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Server Log: https://mclo.gs/8sx4AJo
