Myself as well has 2 others have successfully repaired this issue that started w/ Vsphere 6.7 U3.
In our environments it was trust anchors are mismatch issue.
Vmware maybe able to review script used here and create a new KB / resolution for this different cause of issue not covered in KB 74731 - (which U3a doesn't fix.)
https://www.reddit.com/r/vmware/comments/e4w74j/vsphere_67_u3a_vsan_html5_failed_to_extract/