2013 Koup Ignition Won't Start

This is the second time I've had this issue with my 2013 Kia Forte Koup SX. I
have a remote start button on my key fob, and both times I tried pushing it to
start and the lights, radio, etc. came on but the engine wouldn't turn. The first
time, I had it towed to a friend's mechanic who said it was an "electrical
problem" and fixed it (he was very vague and I don't trust him enough to go
back because I think he overcharged). Now that it's happened the second
time, I've tried looking at it myself but with no luck. I replaced the battery and
checked the fuses/relays and they seem fine. Has anyone else had this
issue??