Ender crashed first, vanillla followed with this message

[Dondy]

java.lang.RuntimeException: could not load extension: https://game.havenandhearth.com/java/launcher-ext.jar
at haven.launcher.Config.command(Config.java:337)
at haven.launcher.Config.read(Config.java:373)
at haven.launcher.Driver.main(Driver.java:153)
Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: https://game.havenandhearth.com/java/launcher-ext.jar
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
at haven.launcher.Cache.update0(Cache.java:284)
at haven.launcher.Cache.update(Cache.java:360)
at haven.launcher.Resource.update(Resource.java:75)
at haven.launcher.Extension.load(Extension.java:47)
at haven.launcher.Config.command(Config.java:334)
... 2 more
Suppressed: java.io.IOException: Server returned HTTP response code: 500 for URL: https://game.havenandhearth.com/java/launcher-ext.jar
... 10 more
Suppressed: java.io.IOException: Server returned HTTP response code: 500 for URL: https://game.havenandhearth.com/java/launcher-ext.jar
... 10 more

[Z1ggy]

Same for me. Not even sure if it's problems with my country again since it doesn't start up with VPN also.

upd: works for me after 15-20 minutes