Reading @primal TOS it looks like they enforce a Maximum Wallet Balance (TOS 4.3). But they don't say how much... I'd be surprised if we reached it...
It's you... tell @primal to hike your limit! https://m.primal.net/IywD.jpg
Or just move funds to another LN wallet...
It's working now. idk what you did, but zaps are back on the menu!