I followed the guidance here to do a FreeOTP backup with
adb backup -f <backup path> org.fedorahosted.freeotp. After I wiped my phone and tried to do an `adb restore I get the message "Now unlock your device and confirm the restore operation." but nothing on my phone happens or prompts, nor does FreeOTP have any keys installed.
I am on Android 8.1 with adb 1.0.32 on Ubuntu 14.04.