[MCL-39] Can't use new launcher

I downloaded MinecraftDev.exe today. It said that it was dangerous because it wasn't commonly downloaded, but I knew that was because it was new. I tried to run it and got this message:

Bootstrap started
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 2/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 3/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 4/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 5/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 6/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 7/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 8/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 9/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 10/10)
Exception: java.net.BindException: Cannot assign requested address: connect
Unable to download remote file. Check your internet connection/proxy settings.
FATAL ERROR: net.minecraft.bootstrap.FatalBootstrapError: Unable to download while being forced
	at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:82)
	at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:361)

Please fix the error and restart.

I don't know how to fix it