Forge won't start due to Gradio/TypeError

Help needed: Forge won't start due to Gradio/TypeError loop (RTX 5060 Ti)

Hi everyone. I'm facing a persistent error when trying to launch the Forge WebUI that I cannot fix.

My setup:

GPU: NVIDIA GeForce RTX 5060 Ti (16GB)

Python: 3.11.9

PyTorch: 2.11.0+cu128

OS: Windows 11

The problem: After a fresh install of the latest Forge (f2.0.1v1.10.1-1.10.1), the web UI fails to start. The console shows Running on local URL: http://127.0.0.1:7860 but any attempt to open it in a browser results in a TypeError: argument of type 'bool' is not iterable followed by ValueError: When localhost is not accessible.... The errors happen in gradio_client\\utils.py.

What I've already tried (multiple times):

Installing specific compatible versions of fastapi, pydantic, and gradio.

Performing a completely clean reinstall (deleted venv folder) and letting Forge reinstall all dependencies.

None of these steps have resolved the issue. Has anyone successfully run the latest Forge build and encountered this? Any advice would be greatly appreciated.