Hi,
Unfortunately, we do not have hackrf for tests now.
So I would suggest to try this very basic SoapySDR config string:
SoapySDR_init_args=driver=
hackrfIf it does not work I would suggest to refer HackRF SoapySDR plugin
docs.
Also you can take a look a the Pyramid logs in the %TEMP%\NoxFox\pyramid folder. That may give you some hint for problem solving.