Backport 1.8.2: Handle api explorer routing error (#12354)#12385

arnav28 merged 2 commits intorelease/1.8.xhashicorp/vault:release/1.8.xfrom

ui/backport-pr-12354-1.8.xhashicorp/vault:ui/backport-pr-12354-1.8.xCopy head branch name to clipboard