Hi there, I have made several modpacks before and followed the exact same steps, however when I install and play it on the launcher: it either doesn't even open Minecraft or if it does, then it's just base 1.12.2 Mc without any installed mods from the modpack.
Here's the link to the Dropbox folder:
https://www.dropbox.com/s/wrauzcqbt2dbz79/World of Snow.zip?dl=0
Regarding the changes to Dropbox's changes: I followed the forum thread solution of changing the necessary parts of the link (www to dl, dropbox to dropboxusercontent, ?dl=1).
I updated the modpack several times as I thought the root of the problem may have been the Forge 'modpack.jar' file. I've so far tried the 'Latest' and 'Reccommended' Windows Launcher, Universal and Launcher downloads. No result.
Maybe it is a specific mod or a combination of mods making the whole modpack unplayable?
Thanks for any help,
Charlie