All skins and capes are Steves or Alex

You’re using a modified client. Does this happen in a fully vanilla environment?

It happens to me too and they don't know the reason, they say it's the server that blocked me, I've investigated and testing the server and there's no solution.

@Thedave2011 Please try a vanilla env as suggested.

What is your ISP? Internet service provider

yes

it happened whit all launchers

Movistar

Thanks for the report! This is an issue with your ISP, see MC-301178 for more information. I’m resolving this as a Duplicate.