[ 98%] Generating thbook.pdf

This is pdfTeX, Version 3.141592653-2.6-1.40.22 (TeX Live 2021) (preloaded format=pdftex)

restricted \write18 enabled.

kpathsea: Running mktexfmt pdftex.fmt

mktexfmt: mktexfmt is using the following fmtutil.cnf files (in precedence order):

mktexfmt: /usr/share/texlive/texmf-dist/web2c/fmtutil.cnf

mktexfmt: mktexfmt is using the following fmtutil.cnf file for writing changes:

mktexfmt: /home/rodrigo/.texlive2021/texmf-config/web2c/fmtutil.cnf

mktexfmt [INFO]: writing formats under /home/rodrigo/.texlive2021/texmf-var/web2c

mktexfmt [INFO]: --- remaking pdftex with pdftex

mktexfmt [WARNING]: inifile pdfetex.ini for pdftex/pdftex not found.

mktexfmt [INFO]: not selected formats: 19

mktexfmt [INFO]: failed to build: 1 (pdftex/pdftex)

To my untrained eyes it seems that a "pdfetex.ini" file is missing.

Any ideas on how to solve this issue?

Regards,

Rodrigo Severo