Linux: cannot connect to simulation

[prensing]

Describe the bug
When I run a robot simulation, and try to connect, it never does.

To Reproduce
Start simulation
Start AS, use "Connect to simulation", it never connects.

I see lots of connection messages in the simulation output, but it does a new one every ~1 second, so presumably, AS does not think it worked.

I tried the 2024 version, and it connected immediately.

Some output from the simulation:

`....
[phoenix] Library initialization is complete.

[phoenix-diagnostics] Server 2025.1.0 (Jan 3 2025, 16:39:33) running on port: 1250

[PathPlanner] PathfindingCommand finished warmup
NT: Got a NT4 connection from 127.0.0.1 port 41548
NT: Got a NT4 connection from 127.0.0.1 port 41566
NT: Got a NT4 connection from 127.0.0.1 port 41588
NT: Got a NT4 connection from 127.0.0.1 port 41606
NT: Got a NT4 connection from 127.0.0.1 port 41622
NT: Got a NT4 connection from 127.0.0.1 port 40992
NT: Got a NT4 connection from 127.0.0.1 port 41016
NT: Got a NT4 connection from 127.0.0.1 port 41038
NT: Got a NT4 connection from 127.0.0.1 port 41054`

Version (required):
Version: 4.1.1
Distributor: WPILib
Platform: linux-x64
Build Date: 1/9/2025, 20:11:28 UTC
Electron: 32.0.2
Chromium: 128.0.6613.84
Node: 20.16.0

Simulation is using WPILIb 2025.2.1. Note that this is on Linux. I have not tried Windows.

[jwbonner]

To clarify, 2025 AdvantageScope can't connect to a 2025 WPILib project but 2024 AdvantageScope can connect to the same project? This a particularly odd issue, since AdvantageScope's NT client hasn't changed for 2025. I also haven't been able to recreate this on a Linux device using this code, so anything that helps narrow down the issue would be useful. Here are some things you could test:

• Can 2025 AdvantageScope connect to a different 2025 project? What about a 2024 project?
• Does this happen on other devices? What if you run AdvantageScope and the simulator on different devices?

[prensing]

To clarify, 2025 AdvantageScope can't connect to a 2025 WPILib project but 2024 AdvantageScope can connect to the same project?

Yes correct. I will try to reproduce it and get you more info, test results.

[prensing]

More info. I see the same issue with our 2024 robot code: I can't connect with the AS.
I can connect with version 3.0.1.
I will try a different machine when I can.