Okay, so this problem has only happened once but is so weird, that I have to share it.
So I was on my PC, some guy had just friended me and stuff. And later on, he tells me this:
[CHATTER]: Hey, I think there's something wrong with your server. Everytime I log in there, It doesn't seem to spawn anyone.
Meta_KnightX: There's like no one on though
[CHATTER]: I'm on it.
At first I thought he meant that no one was joining and he was the only one. When he said "I'm on it" I thought he meant he was onto inviting his friends to play on my server.
I just continued on.
Later, Va11Jr reported it to me:
Va11Jr: hey, meta. something going on your server, the starting problem, the time clock has stopped because it wont spawn us
Va11Jr: of the starting light
Him being more specific, I figured out that something was wrong.
Interested, I went on, and as it was said, I didn't spawn
I tried making it into the next track, but still didn't spawn.
So I left the minigame. Still didn't spawn.
I try going back to the minigame, and this appears (red text):

It appears that time BROKE.
I restarted my server and it fixed.