Regrowth issues: can't load the modpack

[MiningDutchman]

Title:

Regrowth issues: can't load the modpack​

Launcher Version:

1.4.11​

Modpack:

Regrowth​

Modpack Version:

0.9.1​

Log Link:

http://pastebin.com/P8ErcnSL​

Details of the issue:

I've already tried a lot of things to get this modpack (which looks pretty cool) to cooperate with me, like increasing my max RAM for FTB, starting it with Force Update, closing the launcher and re-opening it, but so far, nothing has worked yet. The only issue with the log link, however, is that I actually cannot physically copy the log to my clopboard after I launch the modpack, because it seems to completely freeze after clicking 'Launch'. After the last message from the log in the console, there are two more messages saying 'Beginning authlib authentication attempt' and 'successfully created YggdrasilAuthenticationService. Sometimes, however, it does start up Minecraft. The issue here is that it is merely Minecraft. Yeah, completely Vanilla Minecraft. The modpack has not been added to it. So it just doesn't work. The Log Link shows the Log when it occurs that it launches a Vanilla Minecraft 1.7.10 version.

Now I did notice that there was the following in the Log:
[16:23:34] [ERROR] MCInstaller.gatherAssets:173: pack.json file not found-Forge/Liteloader will not be able to load!
but since I do not know what it means, I was hoping someone could help me with that part, if that is the issue which will be able to solve everything.

Hopefully thank you.

Sincerely,
MiningDutchman​

 

[jikuja]

On the launcher go to options then click the force update button, then launch the modpack.