Ran into the same issue when attempting to install 23.0.2, downgraded autoconf version and it successfully installed.

Steps I followed:

brew uninstall autoconf --igonre-dependencies
cd
curl -O -L http://ftpmirror.gnu.org/autoconf/autoconf-2.69.tar.gz
tar -xzf autoconf-2.69.tar.gz
cd autoconf-2.69
./configure
make
sudo make install

Can confirm that my homebrew’s latest autoconf is keeping asdf from building erlang from source. I followed this gist to install version 2.69 and install proceeded without issue after that:

What would repeating it achieve? But yes, I tried like 4 more times. The bottom of the log file contains this:

./configure '--enable-darwin-64bit' '--with-ssl=/usr/local/opt/openssl@1.1' '--prefix=/Users/dimi/.asdf/plugins/erlang/kerl-home/builds/asdf_22.3.4.17/release_22.3.4.17' LDFLAGS='-L/usr/local/opt/python@3.8/lib' --disable-option-checking --cache-file=/dev/null --srcdir="/Users/dimi/.asdf/plugins/erlang/kerl-home/builds/asdf_22.3.4.17/otp_src_22.3.4.17/make"
configure: error: cannot find required auxiliary files: install-sh config.guess config.sub

Which I am not sure what to make of. The only thing coming to mind is that I have both Python 3.8 and 3.9 installed and maybe homebrew messed the directory symlinks but beyond that, zero clue what to even try.