My custom modpack won't extract in the launcher

[Farew311]

So I set up my custom modpack zip. I hosted it without a problem. I put it into the launcher system as a hidden pack. But when I go to install and open it through the platform, it downloads fine, but hangs when it gets to unpacking xycraft. Is this a client issue? Is this my zip being set up incorrectly? The direct download to the zip is here if anyone wants to take a look at it. But what should I do to fix this?

Screenshot of the hang (login credentials deleted)

Edit: Link to the modpack in case any of you can see if it works on your end