Does not generate a heatmap - no error output to console

[AdamWelch1]

Ok, I'm a C++ developer, not a python developer so I was only able to identify where in the code the issue lies, but I don't know how to fix it.

So even though I've filled in the attention text field in the "Attention Heatmap" accordion box, DAAM does not show a heatmap and no heatmap image is saved to the output folder. Doing some "print" debugging, I was able to determine the issue occurs in daam_script.py on line 285:

try:
    global_heat_map = tracer.compute_global_heat_map(self.prompt_analyzer, styled_prompot, batch_pos)
except:
    continue

That compute_global_heat_map call raises an exception. By removing the try...except block, I can get the default output from the exception, which is as follows:

*** Error executing callback before_image_saved_callback for /home/user/stable-diffusion-webui/extensions/stable-diffusion-webui-daam/scripts/daam_script.py
    Traceback (most recent call last):
      File "/home/user/stable-diffusion-webui/modules/script_callbacks.py", line 309, in before_image_saved_callback
        c.callback(params)
      File "/home/user/stable-diffusion-webui/extensions/stable-diffusion-webui-daam/scripts/daam_script.py", line 332, in handle_before_image_saved
        before_image_saved_handler(params)
      File "/home/user/stable-diffusion-webui/extensions/stable-diffusion-webui-daam/scripts/daam_script.py", line 168, in <lambda>
        before_image_saved_handler = lambda params : self.before_image_saved(params)
                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/home/user/stable-diffusion-webui/extensions/stable-diffusion-webui-daam/scripts/daam_script.py", line 285, in before_image_saved
        global_heat_map = tracer.compute_global_heat_map(self.prompt_analyzer, styled_prompot, batch_pos)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/home/user/stable-diffusion-webui/extensions/stable-diffusion-webui-daam/scripts/daam/trace.py", line 182, in compute_global_heat_map
        maps = torch.stack([torch.stack(x, 0) for x in all_merges], dim=0)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    RuntimeError: stack expects a non-empty TensorList

I'm really not sure how to fix this, so I'm hoping you'll be able to help.