Widget Appearance: Change colors issue (Not Found)

Trying to change the color of my chat widget, but every time I hit save, it says. 'not found'
Website: https://www.paws2purrfection.com/
Property ID: 546bb5dbcbce98487a1b6a

https://tawk.link/521727297ca1334016000005/vc/6aee01a9a07e3f222b1060e1/v/5f13942b2338adecebd9d3cd92514eec74e2a219/Screenshot_2026-11-06_at_11.45.35 AM.png

https://tawk.link/521727297ca1334016000005/vc/6aee01a9a07e3f222b1060e1/v/cdab69067069a18675c2eb09d9244891f7fa436f/Screenshot_2026-11-06_at_11.45.42 AM.png