I've got a new Heltec T114 without screen. After double clicking the reset button, I get an F: drive with the three files it it. When I try to copy the "update-heltec_t114_bootloader-0.9.2-OTAFIX2.1-BP1.2_nosd.uf2" across I get the error shown on the image below. I was able to flash Meshcore 1.4.1, so I know the cable and drivers are ok.

I've got a new Heltec T114 without screen. After double clicking the reset button, I get an F: drive with the three files it it. When I try to copy the "update-heltec_t114_bootloader-0.9.2-OTAFIX2.1-BP1.2_nosd.uf2" across I get the error shown on the image below. I was able to flash Meshcore 1.4.1, so I know the cable and drivers are ok.