fix bugs

app.py

@@ -260,7 +260,7 @@ samplers = [
     "PLMS",
 ]
 
-with gr.Blocks(css=css) as demo:
+with gr.Blocks() as demo:
     with gr.Row():
         with gr.Column(scale=6):
             model = gr.Dropdown(interactive=True,value="absolutereality_v181.safetensors [3d9d4d2b]", show_label=True, label="Stable Diffusion Checkpoint", choices=prodia_client.list_models())
@@ -402,7 +402,7 @@ with gr.Blocks(css=css) as demo:
             gallery_obj = gr.Gallery(height=500, columns=4)
 
         t2i_event = text_button.click(txt2img, inputs=[prompt, negative_prompt, model, steps, sampler, cfg_scale, width, height, seed, batch_count, gallery_obj], outputs=[image_output, gallery_obj])
-        stop_btn.click(fn=None, outputs=None, cancels=[t2i])
+        stop_btn.click(fn=None, outputs=None, cancels=[t2i_event])
         
         image_input.upload(get_exif_data, inputs=[image_input], outputs=exif_output)
         send_to_txt2img_btn.click(send_to_txt2img, inputs=[image_input], outputs=[tabs, prompt, negative_prompt, steps, seed,