I had been having an issue since yesterday. Whenever I log in, this message pops up:
Sorry, but we could not connect to our servers. Please make sure that you are online and that minecraft is not blocked (SunCertPathBuilderException: unable to find valid certification path to requested target)
I'm using Minecraft launcher 1.6.44. I redownloaded Minecraft, reset my internet and reinstalled Java Edition. None of these things seem to be working!