Symptoms
File Manager does not work on a new NG server:
Invalid backend response.
Data is not JSON.
pemcln
group has ID different from 10003:
# grep pem /etc/group
pemcln:x:10001:
Cause
pemcln
group was added before the NG related installation tasks. As a result, it has incorrect ID.
Resolution
Make sure pemcln
group has the ID of 10003 on the NG server.
# groupdel pemcln
# groupadd -g 10003 -f pemcln