This happened to me earlier. If you uninstall and reinstall it should function properly.
Welcome to the forums, User658! I’m sorry to hear you have been dealing with this issue for 3 days. If you’re using a WiFi connection, could you try forgetting the network on your device then re-adding it and see if that helps?
Before you resort to reinstalling the game, make sure that you have written down your support key in the unlikely event that you lose your progress. If you did not save your support key, I suggest reaching out to our support team at firstname.lastname@example.org so they can take a closer look at this matter. Thank you for understanding.