No irregularity, error or mistake in respect to anything required by this article to be done concerning the delinquent lists shall invalidate any tax title based upon later tax enforcement procedure. Nor shall any person be allowed to enjoin or otherwise question the validity of any subsequent step in the tax enforcement procedure by reason of such irregularity, error or mistake, unless he shows that he was actually prejudiced thereby.
W. Va. Code § 11A-2-16