Trouble with loading multiple layers into Unreal Engine

[nparray]

Hello!

I'm trying to load in multiple layers from my organization's ArcGIS Online, and I'm having trouble with the OAuth2.0 authentication. 

With only one private layer, opening game mode triggers the pop-up to sign in, which after successfully signing in, disappears and loads in the layer.

With 2+ private layers, opening game mode triggers 2+ pop-ups to sign in, where the first pop-up I access will load in the layer, and the second one will present the following:

There is no place to paste the code. If I close the tab, the output log will also not give me any indicators of errors. Loading either layer individually does not cause any problems.

I'd appreciate any help in resolving this OAuth2 approval screen.

Thank you!