Ok lets start with basic questions does your project utilize the verse Language? On the top bar of the editor there will be a button named Verse and inside there there will another button named verse explorer, can you take a screenshot of the window that it then opens?
You don’t have to, I just thought you were experiencing this from a known bug with verse respawning people but you didn’t use verse so there’s no way you had that bug and thus probably a seperate one, try to see what “makes” a player unspectateable
Yes its not a simple fix but you essentially need to somehow get the player to respawn afterwards normally (I heard people saying they moved them teams/classes with infinite respawns and then eliminated them, effectively respawning them through normal means fixing the Spectating Issue)