When I try to make a new trade it won't let me select items from my csgo inventory because my csgo inventory won't load. This problem is consistent, I've checked multiple times throughout the last week. I remember months ago I could load my csgo inventory, but now I can't. My inventory and gift inventory are on public. I tried making a new trade on csgooutpost instead of tf2outpost and I still had the same problem of my tf2 inventory loading, but now my csgo one.

When I try to load it it says:
"Aww...
No connection could be made to the Steam API. Unfortunately, there's nothing we can do. Please try again later."