We just updated the server, there was still an issue with the linux depot, but we also updated the start script. Please download the update and see if you still run into this issue 
nope here is the process and the result
BTW my linux is a 32bit one not 64bit in case the lib's are 64bit only
yst@syst-desktop ~/.steam/steamcmd $ ./steamcmd.sh +login anonymous +app_update 339010 -validate +quit
Redirecting stderr to '/home/syst/.steam/logs/stderr.txt'
[ 0%] Checking for available updates...
[----] Verifying installation...
Steam Console Client (c) Valve Corporation
-- type 'quit' to exit --
Loading Steam API...OK.
Connecting anonymously to Steam Public...Logged in OK
Waiting for user info...OK
Update state (0x3) reconfiguring, progress: 0,00 (0 / 0)
Update state (0x3) reconfiguring, progress: 0,00 (0 / 0)
Update state (0x61) downloading, progress: 67,60 (2547242 / 3768036)
Success! App '339010' fully installed.
CWorkThreadPool::~CWorkThreadPool: work processing queue not empty: 2 items discarded.
CWorkThreadPool::~CWorkThreadPool: work processing queue not empty: 3 items discarded.
syst@syst-desktop ~/.steam/steamcmd $ cd ..
syst@syst-desktop ~/.steam $ cd SteamApps
syst@syst-desktop ~/.steam/SteamApps $ cd common
syst@syst-desktop ~/.steam/SteamApps/common $ cd RisingWorldDedicatedServer
syst@syst-desktop ~/.steam/SteamApps/common/RisingWorldDedicatedServer $ ./linux_startscript.sh start
Rising World - 0.9.2.2 - Dedicated Server
Linux 4.13.0-32-generic Java 1.8.0_151 (i386) Memory: 1908 MB
2018/02/15 02:46 AM
____________________________________________________
Start context...
OpenJDK Server VM warning: You have loaded library /tmp/steamworks4j/1.7.1-SNAPSHOT/libsteam_api.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
2018/02/15 02:46 AM server.Main
SEVERE: Rising World - 0.9.2.2 - Dedicated Server
Linux 4.13.0-32-generic Java 1.8.0_151 (i386) Memory: 1908 MB
2018/02/15 02:46 AM
____________________________________________________
RW SERVER: Fatal error occurred!
java.lang.UnsatisfiedLinkError: /tmp/steamworks4j/1.7.1-SNAPSHOT/libsteam_api.so: /tmp/steamworks4j/1.7.1-SNAPSHOT/libsteam_api.so: wrong ELF class: ELFCLASS64 (Possible cause: architecture word width mismatch)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1824)
at java.lang.Runtime.load0(Runtime.java:809)
at java.lang.System.load(System.java:1086)
at com.codedisaster.steamworks.SteamSharedLibraryLoader.loadLibrary(SteamSharedLibraryLoader.java:124)
at com.codedisaster.steamworks.SteamAPI.loadLibraries(SteamAPI.java:24)
at com.codedisaster.steamworks.SteamGameServerAPI.loadLibraries(SteamGameServerAPI.java:25)
at server.i.a(SourceFile:48)
at server.Main.b(SourceFile:344)
at server.Main.initApplication(SourceFile:261)
at commons.JIWApplication.initialize(SourceFile:236)
at com.jme3.system.NullContext.initInThread(NullContext.java:87)
at com.jme3.system.NullContext.run(NullContext.java:130)
at java.lang.Thread.run(Thread.java:748)
2018/02/15 02:46 AM server.Main
SEVERE: Unable to shutdown the server properly (null)
syst@syst-desktop ~/.steam/SteamApps/common/RisingWorldDedicatedServer $