I've signed out and back in and still Error Code 0. Confirmed on website account is still good. Can get into vanilla MineCraft of any version but get Error Code 0 when try to run Forge.
Since MineCraft Java has updated to launcher 2.1.17784 my son gets a Error Code 0 on start of Forge. Can play standard MineCraft but Forge 12.2.2-14.23.5.2847 crashes on launch. This is just since the latest launcher that was pushed a few days ago. Seems to be a issue with the new DNS system.
debug.log