Everyone I invite just immediately declines, even if I try to manually invite them after the two initial declines. These are invites from clicking invite in my wait queue.

Using version 2.0.1.

Any help is appreciated.

Do you have a full friends list?

Do you run any addons that manipulate / work with friend requests in any way?

I don't believe I have a full friends list as it adds people to my list fine. Is there a definitive way to find out?

I don't have any addons that interact with friends lists, no.

If you type "/oq stats" in your chat, it will dump some stats.

Look at the bottom for "# of BN friends:".

It says I have 23 BN friends, I'm assuming thats not the max :)

it's also possible that the person you're inviting is using elvui or some other addon which conflicts with oQueue's invite mechanism

I'm talking about every single person I'm inviting is declining instantly. I tried 20+ people. Usually I might have say 1 out of 20 decline. The weird part is that they were still instantly declining if I tried to manually invite after oQueue failed to it twice. However if I hadn't tried to invite them using Oqueue, such as someone from Trade chat, then they were invited like normal.

I've been using oQueue a long time, and this issue only started with version 2.0.1. Any ideas?

Any further diagnostics I could do?

look to the top right of your find-premade tab. how many bnet friends do you have?

23, according to that as well.