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Instructions for this problem would depend upon what game or program you reached level 205 in.
Also, whether you saved your progress or game status, etc., at any point recently, would also count... you may have no redress except to resume from such a saved status or saved game.
Is your internet connection OK? if so, something happened to the request for a new level, at the server end perhaps, and nothing can be done except to try again, or wait.