my server remains blocked during authentication

hello I ask you for help because I have a problem when we connect to my server, when I turn on my server everything is fine but when we want to connect it remains blocked at authentication in progress ... this problem does not come from me the other players also remain blocked Thank you. sorry for the spelling i'm french

it stays like that, when i join other server or restart minecraft these same thing

no it's not the same on the other server and it's just from me