As a workaround, python3.7 does work with bloodhound.
To change the default python version (current Kali build comes with 3.7 and 3.8) run the following commands (may require sudo/su):
rm /usr/bin/python3
ln -s /usr/bin/python3.7 /usr/bin/python3
this deletes the symbolic link to python3.8 and defaults any call to python3 to using python3.7