Trouble merging Tiktok account?

I have run into a problem here, trying to connect my Tiktok account in Streamlabs OBS to start multistreaming over there. The account did receive streaming approval yesterday, and has access to the Live Center. I tried connecting again today in case it might have just taken the status change a little while to propagate across Tiktok's end.

At any rate, I am still getting to the point in the linking process where a Tiktok authentication browser tab opens, to approve the account access. Then, it bounces me back to the Streamlabs merge page and shows a "User canceled authorization" error message.

I didn't cancel anything. It seems like there might be some communication problem with Tiktok?

Has anyone else run into this conundrum, or might have any advice on solving it? Any help would be appreciated!