if default 0000 does not help then two choice. factory reset box or clear app data.
factory reset will reset everything on the box.
clear app data will delete everything on buzz app only. so shortest route is make a backup of buzztv app and clear data and restore.
I remember when one user along myself were having an issue with the classic not going to recovery mode. after changing resolution it went to recovery screen.
uninstall Disney+ app first by going to settings, apps, Disney+ and uninstall then restart your box. wait for your box to reinstall Disney+ app then relaunch and should work
then turn off your box, then restart modem and router and wait until modem/router is ready. then turn on your box and see if that helps. if not then try using vpn.