TAB "certificate" is missing at EP7.4 IDM

I have a strange situation as attached: TAB "certificate" is missing at EP7.4 Identity Management.

NWA->configuration->security->Identity Management.

1) Our DEV and QAS have exactly the same version 7.4 SP level;

2) I log into DEV and QAS with an ID which is a copy of each other, so EP roles/groups are same

    for both IDs.

No error in trace. I did a search but did not find answer.

I appreciate if someone can shed some light because our EP is not functional.

Thanks!