Good news everyone I manualy solved everything, here are the steps you need to do if you have the same problem:
1.Delete "fullcheck.txt" from your L1justice game folder.
2.Suspend your antivirus for 5-10 minutes.
3.Run Jlaucher as Admin…

Ok so I made the proper modifications on text files and updated/enabled .NET framwork from 3.5.1 to 4.0. then .4.6.
but now Am getting this.... Any suggestions?

Hello there, I'll keep this short.
Here's my problem

Now I need a solution,
Thank you in advance, see ya online... maybe!