Fresh install from aforementioned ISO. Post install full Kali update followed by install of GVM.

The GVM install appears to run cleanly. gvm-setup completes. However, gvm-check-setup fails with

ERROR: Greenbone Security Assistant too old or too new: 21.4.1~dev1
FIX: Please install Greenbone Security Assistant >= 21.04


so isn't 21.4.1 >= 21.04 ?

Is this a case of a bad test in gvm-check-setup or is there some nuance that I'm missing ?

Any ideas on how to fix given that the currently installed version does satisfy the test criteria ?