This should just get a backport to 4.6. 4.5 is unlikely to get the change due to the maintenance support that it currently has.
The parent ticket has a high severity & priority, going to mirror that here for consistency.
Created attachment 1756616 [details]
OpenShift Console doesn't give error when a PipelineRun is viewed
Verified on build version: 4.6.0-0.nightly-2021-02-12-023051
Browser version: Chrome 84
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 (OpenShift Container Platform 4.6.18 bug fix update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.