This modpack requires a dependency that is missing or no longer available. Missing Addon ID: 256287

Everytime I try and install any modpack i always get this errors stating that either terraqueos or Interation wheel and It makes it hard to use the modpacks via twitch

This is a VERY common issue with Twitch and any modpack. The fix is to try again in a few minutes and the issue should resolve itself. It may take up to an hour or so.

The root cause it that curseforge (where the files are downloaded from) has issues from time to time.