[Gameplay] Unable to load into active game

Well as the title says, I'm currently sitting here staring at a black screen on which is displayed the League of Legends logo, as if my game was preparing to show me the loading screen where all champions are displayed. This has been going like this for the last 10-15 minutes, and I have restarted my game several times to no avail.

The particular match is an ARAM match, in which I was playing Sejuani. I had either her Dark Rider or Bear Cavalry skin selected at the time of game start, but I do not own any skin for her, so I'm unsure if that's a cause, but I felt it was relevant information that might be the issue.

EDIT: Game ended and I was able to view the post-game screen with no issues. My team lost the 4v5. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2026528925/201116319?tab=overview

EDIT 2 : Tried to play another ARAM, this time I was Garen. Same result.

EDIT 3 : Restarted my computer and this attempt to join was successful. I don't know what the cause was but it seems to have fixed itself so I guess this was an error on my end.