FIXED. Verified on 5.10.9.0.20190819184228_a6f851e.
Was able to navigate to reports successfully and also access all the reports, including the one which had >31k rows, and it didn't take much time to load either.
Thank you Niladri for all the help. :)
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.
https://access.redhat.com/errata/RHSA-2019:2587