Sonarqube incorrectly reports "Unexpected missing generic font family "Roboto" and "Poppins""

Question

Screen shot of issue

Sonar Qube is showing this bug "Unexpected missing generic font family" even though this Roboto and "Poppins" generic font family is included in the font-family set. there any real bug in this SCSS code snippet.

 .instructorNameText{
    color: $blue;
    font-size: 14px;
    font-family: 'Roboto-Regular';
Unexpected missing generic font family
 }