How can I connect to my server?

[How can I connect to my server?]

Like i said thats probably not your client.
Download a client here -> http://nemo.herc.ws/downloads/
Patch it with this -> https://gitlab.com/4144/Nemo
Select Recommended patches.
This will fix that -> Read msgstringtable.txt (Recommended), just make sure you have an updated msgstringtable in your grf(3200+ lines).
Other issues regarding NEMO/New Client, there are solution on the comments ->

 

[How can I connect to my server?]

if you can connect with an old client then doesn't it solve your title problem.
but if youre looking for new clients -> http://nemo.herc.ws/downloads/ <- 
read the instructions
make sure to patch the client / change mmo.h and recompile.

[How can I connect to my server?]

make sure information(ip/port) on these files match, if youre using a public ip dont forget to port forward it.

char-server.conf
map-server.conf
sclientinfo.xml
network.conf

 

[How can I connect to my server?]

rename your clientinfo.xml to sclientinfo.xml, it appears some clients 2018+ uses sclientinfo.xml

[How can I connect to my server?]

Thats not your client, most likely that one is the official client(kRO's).

make sure your client is patched via NEMO, check DATA.ini and make sure the sclientinfo.xml has your server's information.

 

[running into error messages with Nemo?]

sorry i didn't see the screenshots due to mobile version,  but it seems youre not patching the client, thats a python script to get the client.

You have to execute that script to get the client, no wonder most of the patch doesnt work.

heres what you load onto NEMO

[running into error messages with Nemo?]

theres a Select Recommended next to Apply Selected, also theres a few Patch that has (recommended) next to its name. 
i'd say do the latter and check what was instructed on the guide.

when enabling Patch Name "Enable Multiple GRFs (Recommended)" it ask for a DATA.ini name just leave it as it is, you just need a data.ini file in your RO folder.

if youre new i'd advice to use an older client just so you know that your client/server is working and then try experimenting with newer clients. somewhere 2013-2015, 2014-10-22bRagexe is perfect for new players.

[running into error messages with Nemo?]

not all option on NEMO can be selected depending on the client(date), but try to select those recommended/necessary as long as your client can run/connect to the server.

data.ini looks like this when you open it via Notepad ("YourRO.grf" being the name of grf containing your files and clientinfo.xml or sclientinfo).

[data]
0=YourRO.grf
1=rdata.grf
2=data.grf

if it doesnt exist just make one.