Also, the Spoiler tag doesn't seem to be working, so sorry for the large images bloating the page.
So to start with, I have a Level 13 Fighter, yesterday after adventuring some I got enough XP to level up to 14. So I go to my quarter, pop open the level up menu, make my choices, and then, no matter how much I click or what choices I make, the level up wouldn't go through. So I figure I better log out and re-enter and try again. Just to be sure, I made sure to grab some screenshots of my feat list at level 13 while on the character select screen, which is down here:
So I log back in, and I am greeted with this: I once again don't have any feats or proficiencies. For all intents and purposes, I'm a level 13 fallen paladin with no feats. Not even my character creation feats like Ambidexterity:
Once again I try to level up, and the changes do not go through, no matter how much I click "OK":
I decide to give it a rest and just go to sleep, and try to get some help from a GM in the morning (today).
I log back in, still missing all my feats, and I manage to catch Axis in the chat and I explain my problem. I manage to level up to 14 succesfully and I take Knockdown as I intended, but the feat doesn't show in my radial menu, or my feat list.
He rolls me back to level 13, and I get stuck in the same problem where I can't level up. It eventually goes through, but once again, the feat doesn't show up.
He advised me to come here to the forums, or try the discord, but I'm making the post just so that I have my screenshots and the problem fully detailed for easy reading/linking.
So TL;DR: Took Knockdown at Fighter level 14, but it doesn't show up on my radial menu or feat list.