Install Problem texlive

[Graf, Ingbert (HPE Pointnext Global Shared Delivery DACH)]

Hi,
I’m having trouble running tex after installing the latest updates.
/etc/postinstall/zp_texlive_finish.dash  stops with the following error:

fmtutil [ERROR]: running `pdftex -ini   -jobname=xmltex -progname=xmltex *xmltex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=pdfxmltex -progname=pdfxmltex *pdfxmltex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=mllatex -progname=mllatex -translate-file=cp227.tcx -mltex *mllatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=pdfjadetex -progname=pdfjadetex *pdfjadetex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=latex-dev -progname=latex-dev -translate-file=cp227.tcx *latex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=jadetex -progname=jadetex *jadetex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `luahbtex -ini   -jobname=lualatex-dev -progname=lualatex-dev lualatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `luatex -ini   -jobname=dvilualatex-dev -progname=dvilualatex-dev dvilualatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=pdflatex-dev -progname=pdflatex-dev -translate-file=cp227.tcx *pdflatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `luahbtex -ini   -jobname=lualatex -progname=lualatex lualatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=latex -progname=latex -translate-file=cp227.tcx *latex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `pdftex -ini   -jobname=pdflatex -progname=pdflatex -translate-file=cp227.tcx *pdflatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [ERROR]: running `luatex -ini   -jobname=dvilualatex -progname=dvilualatex dvilualatex.ini </dev/null' return status: 1
fmtutil [ERROR]: returning error due to option --strict
fmtutil [INFO]: disabled formats: 27
fmtutil [INFO]: successfully rebuilt formats: 20
fmtutil [INFO]: failed to build: 13 (pdftex/xmltex pdftex/pdfxmltex pdftex/mllatex pdftex/pdfjadetex pdftex/latex-dev pdftex/jadetex luahbtex/lualatex-dev luatex/dvilualatex-dev pdftex/pdflatex-dev luahbtex/lualatex pdftex/latex pdftex/pdflatex luatex/dvilualatex)
fmtutil [INFO]: total formats: 60
fmtutil [INFO]: exiting with status 13



the simplest LaTeX file does not work.

pdflatex test
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/Cygwin) (preloaded format=pdflatex)
restricted \write18 enabled.
entering extended mode
(./test.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-03-06>
(/usr/share/texmf-dist/tex/latex/base/article.cls
Document Class: article 2020/04/10 v1.4m Standard LaTeX document class
(/usr/share/texmf-dist/tex/latex/base/size10.clo))

! LaTeX Error: File `l3backend.sty' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: sty)

Enter file name:
! Emergency stop.
<read *>

l.4 \begin
          {document}^^M
!  ==> Fatal error occurred, no output PDF file produced!
Transcript written on test.log.



cat test.tex

\documentclass{article}
\usepackage{l3backend}
\begin{document}
Hello!
\end{document}


Reinstallation of texlive did not solve the Problem.

Ingbert