Tested with 4.5.0-0.nightly-2020-05-27-000432, issue is fixed, followed the steps in Comment 0, the URL in dev console is
for "Monitoring -> Metrics" tab
no parameter is added.
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.