Upon failing to log into a server, you should first check if the server itself is experiencing an error. If that's the case, it could explain why you get the ...

java.util.concurrent.ExecutionException: javax.net.ssl.SSLException: Connection reset at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357 ...

at net.minecraft.client.Minecraft.handler$startGame$zzg000(Minecraft.java:3201) at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:496) at net.minecraft ...