So I was installing Rigs Of Rods right now and this is what I got to saw mid-installation.
It looked pretty alarming at first, but then I realised what had happened and had a good laugh out of it.
Hope the mods notice this and do the necessary corrections in the Installer
Your picture is for some reason super tiny but I think I can see that it says it's downloading 1TB of stuff lol. I do remember this has been mentioned before somewhere:
Apparently, from https://github.com/RigsOfRods/rigs-of-rods/issues/2539
This is a visual glitch introduced when the content packs moved to GitHub. I'll look into it eventually.
Yes, it's just a visual glitch once the download reaches over 1GB. The total download is ~2.5GB for all content packs. Just haven't had the time or interest to fix it yet, as it requires redoing part of the installer.