Did not faced this issue. I have followed the exact above (edited) procedure after reinstalling my laptop.Step 1 states to use Wine 3.18 (1. Install last development version of Wine (3.18) - x86 version_ NOT Wine 4.0 stable i386.
There is still the problem with installing winetricks:
When I install winetricks from Ubuntu repos, it then brings in 3.0.1 versions of various Wine packages e.g. wine-stable. "wine --version" then shows wine-3.0. I think that this causes a problem when I try to install b4a.exe to run under Wine as running B4A gives an error window as in attached file. Is there a version of winetricks which will not cause the installation of these 3.0.1 wine packages?
More than that, today I have installed B4J 7.00 in another container, since I need it for GUI app development on Raspberry Pi (which, by the way, is working great with Liberica - JDK 11), using Raspbian Stretch Lite, without starting X server, because I need it for a kiosk project.
After adding winehq repository and installing wine 4.0 (stable), you may check the winetricks repository and dependencies with:
~#apt-cache showpkg winetricks