return of the "none" option for auto encoer

README.md

@@ -75,4 +75,11 @@ Adapters allow you to modify or control the output, e.g. apply specific styles.
 
 # Customization
 
-Update the file ```appConfig.json``` to add more models. Some models need you to accept their license agreement before you can access them, like https://huggingface.co/stabilityai/stable-diffusion-3-medium. 
+Update the file ```appConfig.json``` to add more models. Some models need you to accept their license agreement before you can access them, like https://huggingface.co/stabilityai/stable-diffusion-3-medium. 
+
+# Troubleshooting
+## Result is a black image
+Some parameters lead to black images, deactivate them, one by one, and re-run the whole process:
+- safety checker
+- attention slicing
+- a or the wrong auto encoder

appConfig.json

@@ -65,6 +65,7 @@
     ],
     "refiners": ["stabilityai/stable-diffusion-xl-refiner-1.0"],
     "auto_encoders": {
+        "None": "",
         "stabilityai/sdxl-vae": "finetuned auto encoder for stable diffusion models, see https://huggingface.co/stabilityai/sdxl-vae",
         "madebyollin/sdxl-vae-fp16-fix": "stable diffusion models encoder with fp16 precision, see https://huggingface.co/madebyollin/sdxl-vae-fp16-fix",
         "stabilityai/sd-vae-ft-mse": "works best with CompVis/stable-diffusion-v1-4, see https://huggingface.co/stabilityai/sd-vae-ft-mse"