Check data/scripts/server/server.lua and remove the line "player:addScriptOnce("player/scriptloader.lua")" if it is still present, other than that I would have no clue why it is causing you not to load and i would need to see the server log.
Here is the serverlog If I start the game without any mods (fresh installation):
Thu Feb 02 01:08:28 2017| Client started: "C:\Games\steamapps\common\Avorion\bin\Avorion.exe" "--serverpath=bin/AvorionServer.exe"
Thu Feb 02 01:08:28 2017| Enabled Traces:
Thu Feb 02 01:08:28 2017| Client Beta 0.10.2 r7420, running on Windows 8.1+.
Thu Feb 02 01:08:28 2017| CPU: GenuineIntel 4 Cores
Thu Feb 02 01:08:28 2017| Init Steamworks...Init Steamworks... ok
Thu Feb 02 01:08:28 2017| Init Steamworks ok
Thu Feb 02 01:08:28 2017| Init SDL2... ok
Thu Feb 02 01:08:28 2017| Getting display mode... ok
Thu Feb 02 01:08:28 2017| Current display mode: 1920 x 1080
Thu Feb 02 01:08:28 2017| Creating settings... loading... setting language...setting language file "data/localization/deutsch.po"
Thu Feb 02 01:08:28 2017| ok
Thu Feb 02 01:08:28 2017| Creating client window...Detected 1 displays
Thu Feb 02 01:08:28 2017| Display 0: x: 0, y: 0, w: 1920, h: 1080
Thu Feb 02 01:08:28 2017| Using display 0
Thu Feb 02 01:08:28 2017| Creating window, x: 0, y: 0, w: 1920, h: 1080... ok
Thu Feb 02 01:08:29 2017| Creating GL context... ok
Thu Feb 02 01:08:29 2017| Setting window mode WindowedSeamless... ok
Thu Feb 02 01:08:29 2017| Creating client window ok
Thu Feb 02 01:08:29 2017| Init rendering... starting rendering... initialize...OpenGL Context Information:
Thu Feb 02 01:08:29 2017| Version: 4.5
Thu Feb 02 01:08:29 2017| VersionString: 4.5.0 NVIDIA 378.49
Thu Feb 02 01:08:29 2017| Vendor: NVIDIA Corporation
Thu Feb 02 01:08:29 2017| Renderer: GeForce GTX 950M/PCIe/SSE2
Thu Feb 02 01:08:29 2017| GLSL Version: 4.50 NVIDIA
Thu Feb 02 01:08:29 2017| Init GLEW... ok
Thu Feb 02 01:08:29 2017| Init Debug Message Callback... ok
Thu Feb 02 01:08:29 2017| Set VSync... ok
Thu Feb 02 01:08:29 2017| Secure BackBuffer... ok
Thu Feb 02 01:08:29 2017| Init Canvas...Create canvas of size 1920 x 1080... ok
Thu Feb 02 01:08:29 2017| Init Canvas ok
Thu Feb 02 01:08:29 2017| Init Refraction Texture... ok
Thu Feb 02 01:08:29 2017| Init Post Processing... ok
Thu Feb 02 01:08:29 2017| Init Debug Renderers... ok
Thu Feb 02 01:08:29 2017| Rendering initialized
Thu Feb 02 01:08:29 2017| Init rendering ok
Thu Feb 02 01:08:29 2017| Check problematic drivers... ok
Thu Feb 02 01:08:29 2017| Init shader level... ok
Thu Feb 02 01:08:29 2017| Init loading screen... ok
Thu Feb 02 01:08:29 2017| Draw first loading screen... draw... ok
Thu Feb 02 01:08:29 2017| Init SFX... ok
Thu Feb 02 01:08:29 2017| Init Input... ok
Thu Feb 02 01:08:29 2017| Init GameInput... ok
Thu Feb 02 01:08:29 2017| Init Main Menu... ok
Thu Feb 02 01:08:31 2017| Init Music... ok
Thu Feb 02 01:08:31 2017| Apply loaded settings... ok
Thu Feb 02 01:08:31 2017| Client initialized
Thu Feb 02 01:08:31 2017| Received stats and achievements from Steam
Thu Feb 02 01:08:34 2017| Starting server 'bin/AvorionServer.exe' with arguments '--galaxy-name defaultgalaxy --server-name Freaky's Server --port 27000 --public 0 --listed 0 --authentication 0 --exit-on-last-admin-logout --admin 76561198031583794 --use-steam-networking 1 --threads 3 '
Thu Feb 02 01:08:36 2017| Waiting for Online polling threads
Thu Feb 02 01:08:36 2017| Online polling threads finished
Thu Feb 02 01:08:36 2017| Waiting for LAN polling threads
Thu Feb 02 01:08:36 2017| LAN polling threads finished
Thu Feb 02 01:08:36 2017| remote address: ip, init: steam
Thu Feb 02 01:08:36 2017| Connecting to server at 127.0.0.1:27000
Thu Feb 02 01:08:36 2017| Client UDP: Error receiving from 127.0.0.1, error: Eine vorhandene Verbindung wurde vom Remotehost geschlossen, received bytes: 0
Thu Feb 02 01:08:41 2017| Initiating connection with server ID 90106644372345864
Thu Feb 02 01:08:45 2017| Authentication successful!
Thu Feb 02 01:08:49 2017| Received system error: Ein interner Fehler ist aufgetreten. Verbindung wird beendet. Server Version: Beta 0.10.2 r7420
Thu Feb 02 01:08:49 2017| Client received DC message:
Thu Feb 02 01:08:53 2017| UDP closed
Thu Feb 02 01:08:53 2017| Client UDP: Connection closed
Thu Feb 02 01:08:53 2017| Client UDP: Error receiving from 127.0.0.1, error: Eine vorhandene Verbindung wurde vom Remotehost geschlossen, received bytes: 0
Thu Feb 02 01:08:54 2017| Server shutdown successful.
Thu Feb 02 01:08:54 2017| UDP closed
Thu Feb 02 01:08:54 2017| Client UDP: Connection closed
Thu Feb 02 01:08:55 2017| Exiting client.
Thu Feb 02 01:08:55 2017| Exited client main loop.
Thu Feb 02 01:08:56 2017| Waiting for Online polling threads
Thu Feb 02 01:08:56 2017| Online polling threads finished
Thu Feb 02 01:08:56 2017| Waiting for LAN polling threads
Thu Feb 02 01:08:56 2017| LAN polling threads finished
Thu Feb 02 01:08:56 2017| Stopping local server ...
Translation: The connection was closed by remotehost.
A intern error happened. Connection was closed.
And If I add only your scriptloader.lua into data/scripts/player everything works fine again.
(it doesn't matter if I use the beta version or not). Maybe you can reproduce the error with your savegame too (backup!). You need a savegame which used your mod. Than you delete the game (also the scriptloader.lua) and redownload it. I hope it's only something wrong with me :/