is your handheld running linux? if it is, then refer to my guide on how to properly run sdvx on linux https://docs.google.com/document/d/11ndC_rGtY3LyzZAOrF88SIJ1pvKRrrtUcMIoQufXGS8 (on steam deck for example you will need to go to the desktop mode ofc)
if it's on windows then we need the logs