Cause: Upstream Prometheus introduced a new experimental user interface which coexists with the default user interface but it hasn't reach the same level of testing and stability than the default interface.
Consequence: There is a link in the user interface to switch back and forth between the 2 interfaces. Switching from the experimental UI to the default one returns an empty page.
Fix: the link to the experimental UI has been hidden.
Result: it isn't possible anymore to access the experimental interface.
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/RHBA-2020:0581
Created attachment 1643432 [details] Before click "Classic UI"