Wrong URI for Worlds in StartupGUI

[drewskoots]

Environment

• OS Version: Ubuntu 22.04
• Source or binary build?
  Binary Build, version 8.2.0

This seems similar to #2281 seeing as the URI that is trying to be downloaded starts with fuel.ignitionrobotics.org. Downloading worlds directly from the Fuel website seems to work fine.

Description

• Expected behavior: Upon selecting an example world, it is downloaded from fuel and started.
• Actual behavior: The world download receives a 504 error and the simulation hangs/crashes

Steps to reproduce

1. clean install gz harmonic as described in the docs
2. run gz sim
3. try to open any of the 5 example worlds shown in the dialog box that opens (other than empty of course).

Output

Err] [FuelClient.cc:695] Failed to download model.
  Server: https://fuel.ignitionrobotics.org
  Route: openrobotics/models/panda with ignition position controller model/tip/panda with ignition position controller model.zip
  REST response code: 504
[Err] [FuelClient.cc:695] Failed to download model.
  Server: https://fuel.ignitionrobotics.org
  Route: openrobotics/models/table/tip/table.zip
  REST response code: 504
[Err] [FuelClient.cc:695] Failed to download model.
  Server: https://fuel.ignitionrobotics.org
  Route: openrobotics/models/table/tip/table.zip
  REST response code: 504

[drewskoots]

Additionally, I've notice the resource spawner also fails silently (unless -v 4 is selected)

[GUI] [Dbg] [Application.cc:528] Loading plugin [ResourceSpawner]
[GUI] [Wrn] [ResourceSpawner.cc:614] No paths found in GZ_SIM_RESOURCE_PATH.
[GUI] [Msg] Please wait... Loading models from Fuel.
[GUI] [Msg] fuel.gazebosim.org/openrobotics/models/ not found in cache, attempting download
[GUI] [Msg] Added plugin [Resource Spawner] to main window
[GUI] [Msg] Loaded plugin [ResourceSpawner] from path [/usr/lib/x86_64-linux-gnu/gz-sim-8/plugins/gui/libResourceSpawner.so]
[GUI] [Wrn] [ResourceSpawner.cc:589] Download failed.  Try again.
[GUI] [Wrn] [ResourceSpawner.cc:589] Download failed.  Try again.

I was not able to determine if this is also because of wrong URI

[azeey]

There was an infrastructure issue with fuel.gazebosim.org that was causing these problems. Please feel free to open if you're still having these issues.

[dp1140a]

I am also encountering this error on harmonic whenever I try to download a model form the Resource Spawner