Login Problem

Hi there.

Since this evening, I have a problem while trying to log into my launcher.
In fact, I type my mail address (migrated account) and my password, as usually. But MCL says "my username or password is Incorrect"... I tried to log in on minecraft.net website and mojang's one, without any problem.
But it doesn't want with my launcher. Then, I decided to try using a VPN, and then it worked. I don't understand the problem, and I ask for your help.

Thanks by advance.