TechnicLauncer crashing when downloading modpacks

[FavianReaper]

I have been trying to download a mod pack but everythime it opens minecraft and starts downloading it crashed.

Pic of error - https://gyazo.com/1065454fbd49675cac35042b91f231b0

crash report - https://pastebin.com/zAV4DgEb

[AetherPirate]

Get 64 bit Java

In order to update to Java 64-Bit, please go to the link below and download the version for your computer. If you're using Windows, please use the version Windows Offline (64-Bit). After downloading the updated version of Java. Please click on the installer to install it. http://java.com/en/download/manual.jsp