The launcher opens but the game does not

Yesterday December 27, 2018, in the afternoon I opened the Minecraft launcher and it worked well, since if it opened the game and I played, suddenly on a server, I moved to a plot, in doing so my game stopped, I closed it and when trying to play again I could not, the caster if it opens perfectly, however when pressing "play" it appears as if it were opening the game but it never opens, when reopening the caster and pressing again, it tells me that it is already running and it does not open anything Could you help me?