I have been working on updating the illyrian mod https://github.com/0ADMods/illyrians from a24 to a28, https://github.com/ThePoshBarbarian/illyrians/tree/a24Toa28, though haven't touched it for a bit now, I have at the very least ported it near fully to a28, might still be a few issues though. And still no civ bonuses, unique techs, building, or team bonuses unfortunately.

Where did you find the map? Is it part of the base game scenario maps? Still great work Atrik.

The vulkan error was in the actual game

Are you going to use modern warfare?   Much of it lately is based on drone warfare.   Another thing is that the scout troops use light vehicles. From motorcycles to golf carts. Sometimes drones are deployed from these vehicles.  

I wanted to tinker a bit with that, and managed, but maybe not in a clean way (in Win11): Went to AppData\Local\0 A.D. Empires Ascendant\binaries\data\mods\public. Unzipped public.zip, and renamed this one public.zip.old, just in case. Went to art\textures\ui\session\icons\resources. Pasted a lettuce on top of the meat in food.png.cached.dds. Renamed that file food.png (this step took me a while to figure out, and why I think I'm not doing things cleanly). Zipped all contents of \public in a public.zip file, and moved that up alongside public.zip.old. Result (you would need to take care also of other meat icons @NiRa Muso MIOZOTO, like the ones indicating food cost):