[Juan Mortyme]

White Icon works.  Just the colored one doesn't.  Also noticed that on 4k movies specifically there are multiple icons missing.  When I try to install from Latts repo it fails with these lines from the log.  I was able to install manually though.  I'm seeing that references to that being a bad thing though.  I deleted the addon and reintalled and still same thing.

2021-06-26 13:29:21.683 T:3647992032   ERROR: CCurlFile::Open failed with code 404 for https://holybid.com/kodi/repo/resource.i...-0.1.5.zip:
2021-06-26 13:29:21.683 T:3647992032   ERROR: CAddonInstallJob[resource.images.mediaicons.coloured]: failed to download special://home/addons/packages/resource.images.mediaicons.coloured-0.1.5.zip

@grimmace92 
Alrighty then, looks like the first thing you need is updated Latts' Repo.
If you still need them here are the "fixed" script.module.metadatautils-1.0.37 and script.module.metadatautils-1.0.40 
In the event you still can't get installed from Latts' Repo here is a "cleaned" and repacked version of resource.images.mediaicons.coloured-01.6.

The media icon packs have been a really troublesome addon to get installed correctly. If the update fails, which it most likely will follow thee steps. 1) Shut Kodi down. Clean out the temp  and packages folders in your addons directory. Try again to install either from repo or zip. if it works you're done, if not proceed to step two. 2) Repeat cleaning folders but this time delete the resource.images.mediaicons.coloured folder and contents as well. Try to install. And lastly if all else fails. 3) Repeat cleaning folders. Unzip the addon and copy it manually to your addons folder.

The only real down side of installing from zip or a forced manual install is with Matrix. Matrix will not give notifications if updates are available unless the addon is installed from a repo. Leia dose not have that "feature" or limitation.

So there you go. You now have the tools and knowledge. Use them wisely.

Thanks!  Step 3 was the winner.  I had to manually unzip and copy it to my addons folder and then enable the addon.

You are welcome. Glad to hear you got it working.

Most of the time step 2 works but it's always nice to know there is that final option. As you can probably tell we've all had our share of wrestling matches and battles of will with addons. That one in particular has a long and proud tradition of stubbornness, it's like the bratty child that just plain refuses to do as asked until you grab them by the ear and drag them kicking and screaming to their room.

Do yourself a favour, if you haven't already, grab the icon pack resource.images.mediaicons.coloured and metadatautilitirs-1.0.40 from my google drive (links in a previous post). Why, you may ask? Well,, a couple of reasons. First, I rid it of files of questionable character. Second, I think the version from Latts' repo is not compiled (no .xbt file) so I compiled it. After installing those addons I noticed an immediate increase in both speed and responsiveness of my Kodi installation. I previous doubted the advantages of using compiled texture files and used many in an uncompiled state to facilitate easy customization. But not any longer, I've see the light!

Enjoy.