US Dropbox appointment not showing though eligible for dropbox as per the interview waiver program

US Dropbox appointment not showing though eligible for dropbox as per the interview waiver program. Has anyone faced this kind of situation recently? Any help would be appreciated.
https://travel.state.gov/content/travel/en/News/visas-news/important-update-on-waivers-of-the-interview-requirement-for-certaing-nonimmigrant-visa-applicants.html