progressbar not changing color and again its not animating

[worldtok]

<div class="progress">
              <progressbar now="20" type="success" striped animated></progressbar>
            </div>

import { progressbar } from "vue-strap";

export default {
  components: { progressbar },
}

After i have imported this into my component the color only shows blue and refuse to change

[doubleprincez]

experiencing the same issue on bootstrap 4, vue 2