Error with pdfx package compiled with lualatex

Question

I need to compile my thesis as a PDF/A-compliant document. Therefore I use the pdfx package. Reacently (due to many many tikz figures) I have changed from pdflatex to lualatex (TeX memory - externalization is not an option, because I have links of acronyms and citations in my figures). Lualatex compiles a full pdf but raises the error:

(c:/texlive/2022/texmf-dist/tex/latex/pdfx/pdfx.sty Package: pdfx 2019/02/27 v1.6.3 PDF/X and PDF/A support (CVR/HTH/RRM/PS) \pdfx@minorversion=\count440

! Missing number, treated as zero. \scan_stop: l.332 A number should have been here; I inserted '0'. (If you can't figure out why I needed to see a number, look up `weird error' in the index to The TeXbook.)

The latest version of TeX live have not fixed this issue. Is this a bug or a input error, which I could solve? I am happy for any help. Thanks!

My MWE looks like that:

\documentclass[%
a4paper,
11pt,
BCOR=10mm,  DIV=14, headinclude, headheight=16mm, twoside, openright, onecolumn,
parskip=half,
]{scrbook}

\usepackage[utf8]{inputenc}

\usepackage{xcolor}
\definecolor{darkblue}{rgb}{0.0,0.0,0.4}
\definecolor{darkgreen}{rgb}{0.0,0.5,0.0}
\definecolor{myOrange}{rgb}{1,0.5,0.055}
\definecolor{myBlue}{rgb}{0.1,0.5,0.7}

\usepackage[T1]{fontenc}
\usepackage{helvet,mathpazo}
\usepackage{microtype}
\usepackage[ngerman,english]{babel}
\usepackage[absolute]{textpos}

\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}

% ###--- Own Page Style ---###
\usepackage[headsepline]{scrlayer-scrpage}
\clearpairofpagestyles
\pagestyle{scrheadings}
\ohead{\pagemark}
\ihead{\headmark}
\automark[section]{chapter}
\ofoot[\pagemark]{} %to set pagenumber in footer on first pages of chapters
% ###--- Page Style END ---###

\usepackage{scrhack} %to delete warning <\float@addtolists detected!>

\usepackage[onehalfspacing]{setspace}
\usepackage{graphicx,wrapfig}
\usepackage{overpic}
\usepackage{float} %[H]
\usepackage{enumitem} %This package provides user control over the layout of the three basic list environments: enumerate, itemize and description.
\usepackage{subfiles}
\usepackage[
    bookmarksnumbered=true,
    pdfborder={0 0 0},
    breaklinks=true,
    colorlinks=true, 
    linkcolor=black,
    urlcolor=darkblue,
    filecolor=black,
    citecolor=black,
    linktoc=all,
    pdfstartview=Fit,       %fit to full page
    pdfpagelayout=TwoPageLeft %display pdf in two page view (book)
]{hyperref}

%TODO: check if with texlive 2022 solved?
\usepackage[a-1b]{pdfx} %error with lualatex!!! 

\setcounter{secnumdepth}{3} 

\tolerance=300
\clubpenalty=10000
\widowpenalty=10000
\displaywidowpenalty=10000

\addtokomafont{caption}{\small}
\setkomafont{captionlabel}{\small\sffamily\bfseries}

\setlength\parindent{0pt}
%
%%
%%%%
\begin{document}
%%%%%%%%%%%%%%%%
Title page
%%%%%%%%%%%%
\frontmatter
Intro
\tableofcontents
%%%%%%%%%%%
\mainmatter
Main text.
%%%%%%%%%
\appendix
Appendix
\end{document}

Answer 1

The workaround suggested by @DavidCarlisle works as discribed.

Adding the line \usepackage{luatex85} before \usepackage[a-1b]{pdfx} removed the compilation error with lualatex.