Javascript errors prevent adding new node

[yonas]

Refused to apply style from 'http://localhost:8888/css/loaders.min.css' because its MIME type ('text/plain') is not a supported stylesheet MIME type, and strict MIME checking is enabled.

Container.tsx:46 {name: 'SyntaxError', message: "Unexpected 'F'", at: 1, text: 'Fireworqonsole 1.2.1\n'}