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https://www.minecraftforum.net/forums/support/java-edition-support/1855885-failed-to-login-java-io-filenotfoundexception
https://bukkit.org/threads/wont-let-me-join-server.175889/
https://help.mojang.com/customer/en/portal/articles/1218708-multiplayer-connection-issues-java-edition-
https://www.planetminecraft.com/forums/minecraft/help/failed-login-java-ioexception-se-160492/
https://www.reddit.com/r/Minecraft/comments/91kbgt/only_on_one_machine_failed_to_login_the/
https://stackoverflow.com/questions/23457364/java-minecraft-authentication
https://forum.feed-the-beast.com/threads/failed-to-login-java-net-connectexception-connection-timed-out-connect.34724/
https://stickypiston.co/account/knowledgebase/119/Unable-to-Connect-to-Any-Minecraft-Server---javanetSocketException-Address-family-not-supported-by-protocol-family-connect.html
https://gaming.stackexchange.com/questions/331923/why-does-it-say-could-not-connect-to-server-when-i-try-to-login-to-my-mojang
https://gaming.stackexchange.com/questions/112223/consistently-unable-to-connect-to-minecraft-login-local-lan-server
https://www.gutefrage.net/frage/minecraft-server-hilfefailed-to-login-bad-login
http://www.tnt-treasures.com/rohoui/siruvhr.php?fth=minecraft-net-login-failed
https://hypixel.net/threads/failed-to-login.52743/