Please repeat the error and when the game crashes again, close the client but don't open it yet, instead do the following:
go to your EPW directory and in 'element' find 'logs' folder. Zip it and attach here so I will check what files are missing.
But I really recommend downloading our client. Players are using different patched clients (PW-PH, PW-BR, PW-RU) and it's hard to make such patch that will work on all clients. So downloading the full client from our website would be the best solution.