Also, in the headset settings under System > Developer > Enable USB Dialog you can re-enable the USB dialog if it was accidentally dismissed. In some cases users have had to re-verify their developer account too ( by adding a credit card rather than a phone number ). In some cases toggling dev mode and factory resetting has also helped. These solutions may not be required but unfortunately Dev Mode and ADB can come with quirks sometimes but we have seen a lot of workarounds too. It might be worth reaching out to oculus support too - https://oculus.com/support. God speed traveller!