Works but getting Style sheet could not be loaded in Firefox Developer Edition.

![](https://media.discordapp.net/attachments/105765765117935616/1227179786426646648/image.png?ex=6627773c&is=6615023c&hm=3f630b29dd7d8f76cca07724f4557d70893d2ef9dc838da74d4e4b165504891c&=&format=webp&quality=lossless&width=1100&height=40)

I get this annoying message in development mode, I am using React.