Hi,
12.2 GRID is not good for EBS 12.2
I already wrote a blog post about it on July 18 2017.. ->
http://ermanarslan.blogspot.com.tr/2017/07/ebs-122-watch-out-grid-version-dont-use.htmlAnyways. Good!
The error you are getting, may be related with lots of things.. so you need to check the logs.. but, let's start with the following note->
EBS R12.2.0 Installation on Oracle Linux 6 --Post Install Checks Error RW-50016: Error - {0} Was Not Created (Doc ID 1921643.1)