please read the system prompt carefully:
first it is asking for “(current) UNIX password”. That is 1234.
then, when you enter that correctly, it will ask for “new password”. You enter 87654321
then it again asks for “new password”. You again enter 87654321.
Also, may I please ask why you are attempting to run Armbian? Have you tried Skylark:
If your intent is to receive Outernet broadcast, you should use Skylark, not armbian.
But in any case: you HAVE to read the prompt carefully! it is clearly saying “(current) UNIX password”.