No improvement assessment shall be rendered invalid by reason of a failure to have all of the information required to be in any engineer’s or city recorder’s report, the improvement resolution, the assessment resolution, the lien docket or notices required to be published, mailed or posted; nor by the failure to list the name of, or mail notice to, the owner of any property as required by this chapter; nor by reason of any other error, mistake, delay, omission, irregularity, or other act, jurisdictional or otherwise, in any of the proceedings or steps specified in this chapter, if such proceedings or steps were made in a good faith effort to comply with the requirements of this chapter, unless it appears otherwise that the assessment is unfair or unjust in its effect upon the person complaining. The council shall have the power and authority to remedy and correct all such matters by suitable action and proceedings.