Have you already tried repairing Apex Legends to see if that helps?
If you're using Origin you can repair the game by right-clicking on Apex Legends in your Library and clicking the Repair option when the menu pops up. If you're using Steam try verifying the integrity of the game files to see if that helps. You can find more info on how to verify the file integrity at the Steam Support website.
Let me know if you're still running into the same issue after that. Thanks!