Fortified Health Security interview questions

I applied on LinkedIn and the recruiter sent out an invite to arrange a phone call screening, but when the time came around a few days later I got completely ghosted. She didn't call me at any point during the 30-minute window that was arranged, so I double-checked the invite to make sure all of my info was correct (it was). I sent a follow-up email and still haven't gotten any response to that days after the fact.