Both steps will generate the BIOS errors above. In the second set of steps, PS4 is called out as only PS4 users seems to be able to access the server listings and send invites (even though the invites lead to an error for PS5 users).
1. Download the latest DayZ 1.21 update via PS5
2. Launch DayZ on PS5
3. Attempt to "Refresh Servers" for Official and Community
AND/OR
1. Have a friend on PS4 send a game invite to the server they are logged into
2. Attempt to join the server using the invite sent by the PS4 user