Hello. I somewhat recently downloaded HR: New Beginnings from the Twitch launcher and I am having some problems. I downloaded the modpack all well and good, but when I tried to run it... well first of all it took me to the Minecraft launcher which I guess is ok, but when I hit play a window named "FML Early loading progress" popped up, and that showed up on my brothers screen (wasn't having any problems) too, but then almost immediately on his screen it would move to the actual game and say all of the memory heap and offheap and stuff in the single window, but on my screen, It immediately opened the game but the FML Early loading progress window was still there along with the game window. Then, on my brother's screen it would open the modded launcher thingy where you can do singleplayer, multiplayer, mods, options, etc., but on my screen, there would still be the FML Early loading progress window and the game window would be just like the normal vanilla game, though there is a "(modded)" in the bottom left, even though there are no mods running. I have even left the FML Early loading progress window open overnight with an autoclicker to keep my computer on to see if the modded game would finally launch, but it didn't. Later, I tried looking for tutorial thingies online, but I couldn't find anyone with the same problem. I even added more RAM to my computer (allocated it through Twitch settings) to see if that was the problem, but it wasn't I don't think. I really want some help. This has taken at least 24 hours with no results.
Hey there mate, I just started with this whole modding stuff today and was having the same issues with this modpack. Let's see if my fixes can't help you out, if you're still having issues.
1st, make sure you're allocating proper ram to the installation. (4-6GB at least).
2nd, make sure you're using the correct version of Forge. It should say the version in the Twitch Launcher.
3rd, after you start the installation and it opens the FML Early loading progress, open up your Task Manager and locate the Minecraft Launcher. There may be 1 or 2 of them. End both the tasks. See if the download starts.