fails if negative tokens over 75 about sd-webui-cutoff HOT 3 OPEN

For your specific prompt: try changing [deepnegative:0.2] to (deepnegative:0.2).

Though this is certainly a problem with [from:to:when] constructions in the negative prompt.

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Okay, I've confirmed it is reproducible.
This problem is caused by a combination of sevaral factors.

1. You are using a large negative prompt over 75 tokens. I think deepnegative in your negative prompt is a TI such a ng_deepnegative_v1_64t or ng_deepnegative_v1_75t of https://civitai.com/models/4629/deep-negative-v1x. Right? They consist of 64 or 75 tokens.
2. You are using prompt editing - whether you intended to or not. And its "before" and "after" token counts are different. You have not specified a "before" prompt, so the "before" token count is 0. On the other hand, the "after" token count is the deepnegative's token count, 64 or 75.
3. As a result of that, various things have happened. Thus they led to the error.

This is a bug. But it is very hard to fix for me. If I can come up with a better way, I will work on it.

For workaround, as @tarpeyd12 said, use (deepnegative:0.2). Perhaps that is what you really want to do.
If not, and you really want to use prompt editing, ... I can't figure out a good way which might solve your problem right away.
Sorry.

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2. You are using prompt editing - whether you intended to or not.

it was intentional but i guess i'll have to do without it when using this exension. hopefully you can work it out someday, it works great otherwise

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