close the launcher, and check to make sure you have no instances of eve running under task manager, then try restarting the launcher to see if that works.
I opened it and it just blinked like nothing happened, maybe it because I tried to download the full game client and its still ongoing, I hope it works.
anyway thank you very much, It calms my mind to make a logistic action instead of panicking.
I found the cause of the problem, it is when you quit the game without logging out, then the next time you launch the game the error will appear and the solution is refresh the launcher by clicking the menu button in the upper right corner and log in again,