Environment
- Windows 11
- Krita 5.3.2.1
- AI Diffusion 1.52.1
- ComfyUI 0.26.0
- NVIDIA RTX 3070 Laptop GPU
Problem
Flux 2 Klein cannot be selected although all required models are installed.
The style always reports:
"Flux 2 Klein 4B: missing Diffusion checkpoint model"
What has been verified
- ComfyUI starts correctly.
- Server is reachable on http://127.0.0.1:8188
- /api/etn/model_info/diffusion_models returns both Flux 2 Klein models.
- /api/etn/model_info/text_encoders returns qwen_3_4b.safetensors.
- VAE is installed.
- LoRA is installed.
- Flux models appear correctly inside the ComfyUI model browser.
- The Krita style dropdown only lists SD1.5 checkpoints (Dreamshaper and Serenity).
Expected behaviour
Flux 2 Klein should be detected and become selectable.
Actual behaviour
The style still reports "missing Diffusion checkpoint model".
The interesting part is that ComfyUI correctly detects the Flux models while AI Diffusion still treats the style as if only SD checkpoints were available.
Additional observation
ComfyUI is reachable in the browser before connecting from Krita.
After pressing "Connect" in Krita, ComfyUI starts printing repeated:
URLError(ConnectionRefusedError(10061))
At the same time the ComfyUI web UI becomes extremely slow or unreachable.
netstat shows that Krita and the browser do establish connections to 127.0.0.1:8188, so this does not look like a firewall issue.
Relevant processes:
- python.exe = ComfyUI
- krita.exe = Krita
- msedge.exe = browser
This looks as if the model/resource scan triggered by AI Diffusion overloads or blocks the ComfyUI server.
diagnose.txt
Environment
Problem
Flux 2 Klein cannot be selected although all required models are installed.
The style always reports:
"Flux 2 Klein 4B: missing Diffusion checkpoint model"
What has been verified
Expected behaviour
Flux 2 Klein should be detected and become selectable.
Actual behaviour
The style still reports "missing Diffusion checkpoint model".
The interesting part is that ComfyUI correctly detects the Flux models while AI Diffusion still treats the style as if only SD checkpoints were available.
Additional observation
ComfyUI is reachable in the browser before connecting from Krita.
After pressing "Connect" in Krita, ComfyUI starts printing repeated:
URLError(ConnectionRefusedError(10061))
At the same time the ComfyUI web UI becomes extremely slow or unreachable.
netstatshows that Krita and the browser do establish connections to 127.0.0.1:8188, so this does not look like a firewall issue.Relevant processes:
This looks as if the model/resource scan triggered by AI Diffusion overloads or blocks the ComfyUI server.
diagnose.txt