Why can't I log in to Minecraft anymore? How can I solve the problem?

I've been playing Minecraft for a few years now. However, I have not been able to log in with my account data for about 2 months or so. I'm pretty sure that my account was not banned because I did not receive such an email.

Simply change your password. I also had a short time.

What will appear if you want to register? So is it really because of the data or just not loading?

It says "Email or password is invalid"