I spent the day today trying to get Debian 10 Buster installed on my test raspi, so that I could install YunoHost v4.3.4.2 directly. Encountered several issues (see my discussion thread for details) and had to abandon it.
At present it is looking like I may have to alter my sights, and begin with installing YunoHost v4.1.7.2, and then do the upgrade to v4.3.4.2, as it seems that I cannot install Debian 10 Buster as the base, as had been recommended. Unless someone can provide a solution that helps me get v4.3.4.2 installed, I will start again tomorrow, with v4.1.7.2 instead. Thanks.
Sorry, I really think v4.3.4.2, as the current stable, should be the priority here. Can we please get that working as a complete installable package, with its base OS in place, just as v4.1.7.2 already is?