Linux server

I have set up a standalone server on my debian 9 build. It seems to want to start but I get an error right at the end and the server shuts down. I disabled all plugins and it still happens.
Here is the log.

errorlog_1592429866927.log

I am setting it up to run on hamachi so no issue with opening ports. I don't believe I have a firewall, atleast I never installed ufw and there is no response from any of it's commands. I am in a root terminal. not loged in as root it keeps saying

2020/06/17 03:59 PM: Steam Server Connect failed... (NoConnection)

till I make the server shut down

on restart of server as non su - it does the same as it did as when signed in as root user.

Well I see no Linux64 folder in the server so this means I need to install the server from steamcmd. I just copied the server over from windows.also what file are the environmental variables kept in? If what is to be amended is in the Linux_startscript.sh, this is what is there.

#!/bin/bash

cd $(pwd)

export LD_LIBRARY_PATH="$(pwd)/linux64:$(pwd):$LD_LIBRARY_PATH"

if [ ! -x "`which java`" ]; then echo "You have to install java first!"; exit 1; fi

MEMORY=$(grep -i 'server_memory' server.properties | tr -d '\n\r' | cut -f2 -d'=')

if [ -z "$MEMORY" ]; then

echo "${txtred}No server_memory set. Server starts with 1024mb memory${txtreset}"

MEMORY=1024

fi

if ! [[ $MEMORY =~ ^[0-9]+$ ]]; then

echo "${txtred}The property 'server_memory' is not numeric${txtreset}"

exit 1;

fi

java -Xmx${MEMORY}m -Xms$(($MEMORY/2))m -jar server.jar

I use this command to start the server.

java -Xmx8G -Xms4G -jar server.jar +maxplayers=4 +servername=Rosalia Test

I am a moderate linux user so please forgive my inability.

Ok, I installed the server with steamcmd and the linux64 folder is now there. What file do I have to append to fix this?

Thanks very much. I managed to get it running now now if I can get steam native to work again lol.