[EA app] PvZ GW2 Error "You must sign in to Origin to continue"

Look, we've already switched to the EA app, but I got really confused when I opened PvZ:GW2 and saw a message "You must sign in to Origin to continue". Well, I do admit that I did not sign in to Origin, but I thought signing in to the EA app was already enough.

Still, I think I might have some rough idea about the cause of this weird issue. My laptop switched to standby mode while the game was on and I was carrying it through places where the network wasn't available meanwhile. I wonder if this could be the reason. Now I've tried restarting my laptop several times, and I've also checked the security configuration and confirmed that my firewall does allow the game to get through. I've run out of ideas. What should I do?