The latest upstream release fixes issues such as:
/usr/share/gems/gems/abrt-0.1.1/lib/abrt.rb:6:in `require': cannot load such file -- abrt/handler (LoadError)
from /usr/share/gems/gems/abrt-0.1.1/lib/abrt.rb:6:in `block in <top (required)>'
This issues could be noticed using Bundler to manage an application dependencies and while the issues are not fatal, they caused that the Ruby problems were not propertly reported by ABRT.
Also, the latest upstream release is adding support for uReports, which were introduced in RHEL 7.3 (rhbz#1334604).
As it turns out, there might be (and always were) issues when ABRT daemont is not installed/running. I fixed this via  and released rubygem-abrt 0.3.0 . I'll use this opportunity to fix this in RHEL as well.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.