Problems starting the server on VPS hosting (multicraft panel)

1.12.2 It is worth sponge (7.1.6) on forge (2838). Faced a problem (log - https://pastebin.com/9ePaGcLe). The server does not start only through the multicraft panel, through the debian 9 console it starts and works well.

29.04 07:30:14 [Server] INFO 1) Error injecting constructor, java.nio.file.AccessDeniedException: /./config/97507269907308nanochat.conf.tmp
29.04 07:30:14 [Server] INFO at dk.xakeps.nanochat.NanoChat.<init>(NanoChat.java:60)
29.04 07:30:14 [Server] INFO at org.spongepowered.common.inject.plugin.PluginModule.configure(PluginModule.java:59)
29.04 07:30:14 [Server] INFO while locating dk.xakeps.nanochat.NanoChat

Nanochat is failing on construction because a file cannot be written/read. Check you have the correct permissions to write to the config directory and the nanochat.conf file.

Also, the author should not really be loading the config file in the constructor and instead should be doing it during pre-init, that way they can at least do more sane error handling (or fall back to defaults).

Also, the author should not really be loading the config file in the constructor and instead should be doing it during pre-init, that way they can at least do more sane error handling (or fall back to defaults).
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Can you clarify what needs to be done?