In my case, i have the standard browser dark preference active and the website obliges and shows a broken dark theme. If i instead use the style-injecty version

In my case, i have the standard browser dark preference active and the website obliges and shows a broken dark theme. If i instead use the style-injecty version such as dark reader, it actually fixes the website's broken dark theme and i can see the graph. So in this case, it is completely the website's fault.