Issue importing model, does nothing (SDXL?)

I tried to import ZavyChromaXL from https://civitai.com/models/119229/zavychromaxl.

Testing with Diffusion Bee Version 2.5.1 (0038)

Diffusion bee reads the file for a while, and it has loading animation in the UI. But then suddenly it just pretends to have finished. But nothing has changed. It doesn't add it. And nothing is added to the logfile.

I tried running the convert_model.py tool from this repository manually, and the following happened:

```
-----snip----- (pages of data) -----snip----

, 'ones_3840', 'zeros_1536', 'ones_1536', 'zeros_4160', 'ones_4160', 'zeros_1664', 'ones_1664', 'zeros_4480', 'ones_4480', 'zeros_1792', 'ones_1792', 'zeros_4800', 'ones_4800', 'zeros_5120', 'ones_5120', 'zeros_2048', 'ones_2048', 'zeros_5440', 'ones_5440', 'zeros_2176', 'ones_2176', 'zeros_5760', 'ones_5760', 'zeros_2304', 'ones_2304', 'zeros_6080', 'ones_6080', 'zeros_2432', 'ones_2432', 'zeros_6400', 'ones_6400']
shape mismatch model.diffusion_model.input_blocks.0.0.weight (320, 9, 3, 3) (320, 4, 3, 3)
Traceback (most recent call last):
File "/Users/haakon/src/diffusionbee-stable-diffusion-ui/backends/model_converter/./convert_model.py", line 156, in
convert_model(checkpoint_filename , out_filename )
File "/Users/haakon/src/diffusionbee-stable-diffusion-ui/backends/model_converter/./convert_model.py", line 86, in convert_model
raise ValueError("The model is not supported. Please make sure it is a valid SD 1.4/1.5/2.1 .ckpt/safetensor file")
ValueError: The model is not supported. Please make sure it is a valid SD 1.4/1.5/2.1 .ckpt/safetensor file
```

Does this mean that Diffusion Bee only supports SD 1.5 and not SDXL 1.5?
I think most models on civitai are SDXL 1.5, so that's why they won't import? Maybe Diffusion Bee should give a message about this, when you fail to load a model. So it's easier for people to understand.

Anyways, even if you're not adding support for SDXL, it would be nice to at least get a warning message when the model doesn't import. So I will post this issue, even if I probably figured out the reason for the model not importing.