In the webnovel he's much more haughty in that scene, and it's expositioned in the dialogue that the Esfort Kingdom is the one wronged and that it's basically irrelevant that Corgino was the one who instigated it. So then the king goes on to explain that because the Esfort Kingdom were wronged, it means that the Republic of Ilstin are the ones who needs to pay to settle the matter, and that the negotiation is merely to decide how much they need to pay.
I hope this doesn't count as a spoiler, because this is about what was changed in a scene that already happened in this manga chapter.
(Btw about the "for various reasons" when Lisabeth mentions in this chapter about how she was caught, in the webnovel she explained it better in that scene and says it's because she got drunk in a bar while drinking with strangers and accidentally let her human disguise-magic go when passing out and then woke up with the magic-sealing cuffs on her while inside a cage when she had sobered up.)
