UserAgent: Mozilla/5.0 (X11; CrOS aarch64 10575.55.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
Platform: 	10575.55.0 (Official Build) stable-channel elm

Steps to reproduce the problem:
1. Install crouton and xfce4
2. do 'sudo startxfce4' in shell
3. 

What is the expected behavior?
xfce4 would be launched

What went wrong?
Permission was denied

Did this work before? Yes Before about 18-22 June 2018

Chrome version: 67.0.3396.87  Channel: stable
OS Version: 10575.55.0
Flash Version: 

Was my developer mode undone?