The offer up app stopped working on my phone. All the sudden its like Im someome new

Just 2 days ago out of the blue the offer up app stopped on my phone. It acts like I'm a new person and asks me to register.
Anyone else have this happen or am I the lucky one?
Do I have to delete the app and add it again?

Same here. Every time I try to to go messages or see my posts it says there's an error. Its made it impossible to sell or buy items.