No action,
inaction or recommendation by the City, or its City Council or any
board or commission, or any of its administrative agencies or officials,
on any matter shall be held invalid or set aside by any court of competent
jurisdiction on the ground of improper admission or rejection of evidence
or by reason of any error, irregularity, informality, neglect or omission
(hereafter, "error") as to any matter pertaining to applications,
notices, findings, records, hearings, reports, recommendations, appeals
or any matters of procedures, unless the court finds that the error
was prejudicial and that the party complaining or appealing suffered
substantial injury from that error and that a different result would
have been probable if the error had not occurred. There shall be no
presumption that error is prejudicial or that injury was done if the
error is shown.