10.13.6 high sierra, recovery, no Administrators found

First some background...

2 months old Macbook pro 13, mid 2018, re-installed OS by recovery, on an APFS encrypted drive formatted by Disk Utility on recovery pre-install time.

Using system normally to this date. Works as expected. Every time I boot computer it asks me first for Disk password and then for user account password. Expected.

Now I wish to re-install OS. More specifically, I want to install from USB a fresh Mojave version.

To my surprise, booting USB Mojave installation was not possible, it complained that security configuration of my mac did not allow me to install from USB.

Fine, I went into recovery and attempted to use the Security Tool available in recovery, aaaannnd, when I try to use it. I get:

Note that this happens even if I unlock the APFS encrypted drive prior to the above action, on Disk Utility tools, on recovery mode itself.

I went on reading some topics and noticed that my admin users do not have secureToken enabled. No user has.

It seems I cannot even wipe my drive using Disk Utility tools from recovery without an "administrator account", which is very weird.

Any suggestions?