(1) A mandala in a dream is a reminder that order is possible - because already latent - in the psyche. ‘Remove’ the disturbing elements - that is, bring them into harmony with the other parts of the psyche - and order will be restored.
(2) If a disarranged mandala appears in a dream, this will indicate that the healing - whole-making - power of the (unconscious) psyche is temporarily out of action. Some destructive attitude - a guilt-and-anger or inferiority complex, or whatever - is blocking the flow of the natural healing powers.