thesolar This may be a silly question, but are the parts of Play installed on the 9a, and have they been given the same permissions as on the 8a? Are the location settings the same on both devices? How about the permissions on the Uber Driver app?
If the Uber Driver app was installed on the 8a some time ago, it is possible that since then they have upgraded the checks done while registering the app on a device for the first time.
thesolar The Uber Driver app requires the integrity API works on the 8a and doesn't work on the 9a.
Is it possible to provide more detail about "doesn't work"? Is there an error message?