Creating a world with unset packfolder colors errors on startup

[CarlosFdez]

What happened?

If you create a world for a system that have packfolders but without setting colors in system.json, the world does not start.

What ways of accessing Foundry can you encounter this issue in?

• [X] Native App (Electron)
• [ ] Chrome
• [ ] Firefox
• [ ] Safari
• [ ] Other

Reproduction Steps

In PF2e during development, the world initially didn't start (server version 12.319). I added color props to all pack folders and nested folders (after digging through bug reports in the discord) and that allowed us to start. I tested removing them and creating a new world (not an existing world) and the errors is still there.

From the user side, this is all you see:

What core version are you reporting this for?

12.310

Relevant log output

The server side (I'm running with the NodeJS version for v12) has a more interesting error message.

FoundryVTT | 2024-04-30 05:26:09 | [error] Cannot read properties of null (reading 'css')
TypeError: Cannot read properties of null (reading 'css')
    at n (file:///E:/FoundryVTT-12.320/resources/app/dist/packages/world.mjs:1:6549)
    at #i (file:///E:/FoundryVTT-12.320/resources/app/dist/packages/world.mjs:1:6930)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async #s (file:///E:/FoundryVTT-12.320/resources/app/dist/packages/world.mjs:1:5920)
    at async World.updateActivePacks (file:///E:/FoundryVTT-12.320/resources/app/dist/packages/world.mjs:1:5459)
    at async World.setup (file:///E:/FoundryVTT-12.320/resources/app/dist/packages/world.mjs:1:9773)

Bug Checklist

• [X] The issue occurs while all Modules are disabled

[aaclayton]

Closing as duplicate of https://github.com/foundryvtt/foundryvtt/issues/10545

[CarlosFdez]

Whoops, I checked, but I couldn't find it. Turns out its a bit old, muhbad.