I've repeatedly try'd to download the latest version of the pack through Twitch but every time it fails and says "Object reference not set to an instance of an object." what should I do?

Getting multiple reports of this. The issue is with Twitch client. Recommend opening support tix with them. Issue is likely a temporary problem as google searches show issue cropping up from time to time over last couple years. Try again later seems to be easiest option. You can also use multimc instead of twitch.

Work around: https://youtu.be/uvwy2bEN6k8

Thanks bro!

New reports of this issue have dropped off. I assume Twitch "fixed the glitch." Will close this issue in a week unless new reports come in.

no new reports, I assume this issue may re-appear from time to time since looking at google there is a history of that happening in the past, the above solution resolves.