Hello. I have followed these instructions but I get stuck at "Fastboot is scanning for devices". I get the message "connection to device lost". It seems that the installer does not recognize the phone, which is why I get stuck. My phone is a Oneplus 1 (bacon) and I am running UBports installer 0.4.18 beta, dowloaded from snap, on Linux Mint 19.3. Any help would be warmly welcome, as my phone is a brick at the moment.