Glad I added that 515 unit test; though also failing on TG too. Likely not worth merging until they sort out why or can confirm for sure that all those errors somehow are false positives.

I can confirm they are not false positives:

You just don't get icons in TGUI.

Whathefuk...

Looks like Walter's edit should be viable.

Indeed. I don't know why I thought fexists() would work with RSC bundled resources...

This still seems kinda unstable. So character panel never ended up loading in the human model, and each time it was opened it would incrementally add in more clothes sprites. Everything else seemed fine, expect that it then proceeded to crash or disconnect (ending the debug run) after a few minutes after round start. These were the errors I experienced related to the character panel:
dd.log

Its not obvious yet what caused a crash/disconnection though. I was using 515.1606. Will try again using 515.1608.

Still crashes/disconnects, though this time preferences panel seemed to be working other than client/server console spamming winset: Parameter preferencebrowser.on-close not found. Settings don't seem to stick either.

I'm not sure these are related, it all reads out as a null mob. Intriguing though...
In any case this is meant primarily for TM to the Linux server so we can find out what happens there

This PR has been inactive for long enough to be automatically marked as stale. This means it is at risk of being auto closed in ~ 7 days, please address any outstanding review items and ensure your PR is finished, if these are all true and you are auto-staled anyway, you need to actively ask maintainers if your PR will be merged. Once you have done any of the previous actions then you should request a maintainer remove the stale label on your PR, to reset the stale timer. If you feel no maintainer will respond in that time, you may wish to close this PR youself, while you seek maintainer comment, as you will then be able to reopen the PR yourself