Not able generate a accesstoken with scope openid

While using /autho/token API I am not able to get access token
giving me the error
{
“error”: “access_denied”,
“error_description”: “Client has not been granted scopes: openid”
}
if i try to to add openid in the dashboard i am not able to add
can help me the with solution

Hi @gouthamvr1999hy,

Could you please share the request you are making that is throwing this error?