Switchingtojoplin

Oh, it let's me log on, but then tells me I have to unsync a device. But it tells me that for Web, Phone, and Desktop app. How else am I supposed to log in? I switched yesterday to desktop to pull some notes, then tried to switch back to phone. It gave option for phone, desktop, and Web. I chose Web to try and leave Desktop and Phone. Now I can not access any.