lakitu64

I too am experiencing a similar error. I have the same error log, same java, same launcher, same windows version, but Norton AntiVirus. I believe the problem is that the actual mod files and gui files are not being downloaded, therefore the launcher cannot proceed to the following screen, there being no gui to display. I believe the antivirus might be autonomously blocking the download of the necessary files. If windows firewall has any sort of log, I suggest you take a look at it and see if it says anything. I hope you find a solution as I too am unable to experience tekkit on my computer.