Started a new project today and as usual it happens this issue, that makes development a pain in the ass. Like always I checked all and all and all again and again and obviously publicPath is one the first thing I checked and it was always correctly set ("/wp-content/themes/my-theme"). Finally as always the only thing it seems to solve is what I wrote here:
that is
sudo rm -rf $(xcode-select -print-path)
xcode-select --install
Very very annoying!
Any other idea?