same thing is happening to me can´t flash mi 9 neither fastboot nor edl mode, no matter if i choose generic qualcomm or xiaomi mi 9 in edl mode. i understand in fastboot mode cannot be possible due the bootloader´s device is locked but in edl mode chimera should flash it. all i get sometimes is the message error "qualcomm loader not found please choose loader" some other times i get the message device is in invalid state please disconnect and put divice in edl mode manually i kow for sure this error has to do with chimera.