No improvement assessment shall be held invalid by reason of a failure to give, in any report, in the proposed assessment, in the assessment ordinance or ordinances, in the lien docket or elsewhere in the proceedings, the name of the owner of any lot, tract or parcel of land or part thereof or the name of any person having a lien upon or interest in such property, or by reason of any error, mistake, delay, omission, irregularity, or other act, jurisdictional or otherwise, in any of the proceedings or steps hereinabove specified, unless it appears that the assessment as made, insofar as it effects the person complaining, is unfair and unjust, and the Council shall have power and authority to remedy and correct all such matters by suitable action and proceedings. (Ord. 2-1961 § 18 (part), 1961.)