Done MYM Launcher could not be Downloaded.

To report this error, provide:

java.net.SocketException: Address family not supported by protocol family: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at com.skcraft.launcher.bootstrap.HttpRequest.execute(HttpRequest.java:115)
at com.skcraft.launcher.bootstrap.Downloader.execute(Downloader.java:73)
at com.skcraft.launcher.bootstrap.Downloader.run(Downloader.java:42)
at java.lang.Thread.run(Unknown Source)



Ive tried everything.. it all started when i got mod rejections trying to play on stoneblock.. deleted the pack folder and tried to reinstall it.. The MYM launcher couldnt download modpacks.. deleted the launcher and reinstalled.. still no go.. deleted the .mym folder to restart the WHOLE process and now im getting this message.. Java is also updated.. All started cuz i was gone saturday and didnt play.. Twitch Launcher aint working either.. so im at a loss
Could anyone HELP ME!!! i wanna get back on my StoneBlock.. lol

 

ive read some of those anser you have gave.. in my Windows Command i entered the java code you shown someone and says "
PS C:\WINDOWS\system32> java -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false -jar MyM-Launcher.jar
Error: Could not find or load main class .net.preferIPv4Stack=true"

Also i dont not have that "Relevant Knowledge" malaware on my computer..
[doublepost=1541405196,1541401746][/doublepost]Got it fixed..

The longest time i couldnt figured out how to do things.. Heres the easiest way to do it..

Go to start
search "cmd"
click on it
Right click on cmd name
make sure Quick edit is enabled
Copy and paste "setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true"
hit enter..
Fixed simple as that...

This dud helped me that quick...