Brawl Stars Friend Invites Not Working on iPhone

I play Brawl Stars on an iPhone in the United States, and for about the last two weeks I have not been able to invite my friends to my team. When I try to send an invite, nothing happens at all; there is no error message, but the invitation simply does not go through. To solve this, I have already tried reinstalling the game and restarting my phone, but the problem continues in the same way. I have not yet been able to get any help because I have not contacted support before this. I kindly request that you check my account and fix this issue so that I can properly invite my friends to my team again, or at least inform me clearly what is causing this and remove any restriction if there is one.