Login failed:invalid sesion

Hello Mojang I play has Minecraft for 4 years. But today when I'm going on Funcraft its sa tells me: Login Failed: Invalid Sesion. so I restarted my games moreier but selui if not to walk always. For iformation I am on Windows 7.1 Profesionelle, Intel Core I5. Well I hope you find the answer. I strongly encourage you. Goodbye

ps: I'm under Minecraft 1.9.4 Forge
Bye