ModuleParseError: Module parse failed: Unexpected token (1:0)

[hkmsadek]

Hi there, I am getting this error

./styles/main.css
ModuleParseError: Module parse failed: Unexpected token (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders

In my ./styles/main.css I have a bootstrap CSS file like this

body {
  margin: 0;
  font-family: var(--bs-font-sans-serif);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

hr {
  margin: 1rem 0;
  color: inherit;
  background-color: currentColor;
  border: 0;
  opacity: 0.25;
}

hr:not([size]) {
  height: 1px;
}

h6, .h6, h5, .h5, h4, .h4, h3, .h3, h2, .h2, h1, .h1 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-weight: 500;
  line-height: 1.2;
}

Not sure from where this error is coming.