u/Extra-Arugula3273

I've had an account for a while but everytime I've tried to submit a request, the site tells me my account doesn't exist, even though I'm using it to download books just fine. I recently got a new phone and even made a new account and that one also 'doesn't exist', on the day that i made it – the site said there was no such account (this was months ago and nothing has changed), which was absulutely baffling. What do i do?