2018-09-19 ragexeRE not supported by rathena. If you really want use this client, then use hercules.
Maximum supported version in rathena for ragexeRE is 2018-06-21.
For 2018-09-19 with rathena, you can use ONLY ragexe. This exe file you can download here http://nemo.herc.ws/downloads/2018-09-19aRagexe/