Mikegyver

Actually got newer. U just not checking carefully.
http://herc.ws/board/topic/15348-kro-unpacked-clients-releases/

Not yet suppported.. currently rA is supporting 2015-11-04 (the latest supported client by rA)

U are using itemInfo.lub or itemInfo.lua?
U should place the itemInfo file in the system folder inside of kRO full client folder & be sure to diff itemInfo in nemo patcher.

Check this out.
 

Well.. i would agree with @Freya
 
U can search in this forum for the guidances.. but i would give u an introduction on how u make ur server goes online & it is on your effort then how to turn in into reality.
To put it online. U can either host ur server in a vps or at your home.
Hosting at home - u need to do some networking stuff.. u need to configure port forwarding on ur modem / router to allow incoming connection to login, char & map server port + setting char & map IP to ur ISP public IP.
While hosting on vps, u need to learn some basic linux command as most VPS are running on linux OS + with setting char & map IP to VPS IP.
Both of these go for server side (either hosting at home or vps) while on clientside, u need to set the address in clientinfo.xml into respective IP use (either ISP public IP if hosting at home or VPS IP if hosting on vps)
Those are some of the intro.. the rest, u can googling around. I'm pretty sure u can get brighter image by doing that. And last but not least, wish u good luck!

Just follow these guide. Anyway, i does not own any of those guide.. just bump into ur post & found these guide which might help u to setup the server.
 

do u have try disable packet encryption on nemo patcher & disable packet obfuscation on src/core/config.h?

this client use itemInfo.lub / iteminfo.lua.
1st. on nemo patcher. find this patch. Load Custom lua file instead of iteminfo*.lub. change to -> System/itemInfo.lub
2nd. if u want to use ItemConverter tool, u need to change to above to System/itemInfo.lua & use below tool.
 

perhaps these commits would give u little bit idea how to do it..
on server side..
https://github.com/rathena/rathena/commit/39e54d65bb0a6f56f5a07348822cf7493c85dd47
on client side
https://github.com/ROClientSide/Translation/commit/a7cdb5be2e5ca5a00715705998d201184b0d8cb6

Perhaps this will help..
 

no.. still some.. i take example one.. the rest u should identify it by urself...
accessoryid.lub
ACCESSORY_BLUEANGELWINGS = 2458, accname.lub
[ACCESSORY_IDs.ACCESSORY_BLUE_ANGEL_WINGS] = "_blueangelwings",

so below i provide u a screenshot.. of what happen when we doing rebase. the first image. showing the changes commited in the new branch. lets assume these changes are all ur mods in ur server.. although u made the changes (mod), but ur rathena repo clearly not the latest version & more likely outdated.. which in ur case, more obvious, on 2013..

while the second image, after doing the rebase, ur rathena repo will be updated to the latest commit (HEAD commit) & all your mod are on top of the HEAD commit.. so this is the way u can keep ur rathena repo on track + preserving all ur mods those u made...

 

Owh man... not sure about this client.. but, i think it is the item description that is missing.. if the item is missing.. should be the item will be identify by apple.. not sure about this client.. is it still using idnum2tables?

for the data.grf & rdata.grf, u can update those to the latest by simply run kRO patcher..
http://herc.ws/board/topic/2485-ro-patcher-lite-v2415746-last-updated-20170401/
while for the itemInfo.lub, texture & sprite, can be obtained from the link below..
https://github.com/zackdreaver/ROenglishRE

guide / tutorial in linux OS
https://rathena.org/board/topic/53369-how-to-setup-your-ragnarok-server-in-linux/
guide / tutorial in windows OS
https://rathena.org/board/topic/104452-tutorial-how-to-create-ragnarok-offline-2015-client/
 

i afraid u install wrong version of flux cp to ur emulator.. each emulator has their own flux cp. i tried so far to install flux cp on 3ceam, rathena & even hercules.. all not having problem.