The manage family plan option has disappeared for me as well. I logged into the primary account. The option just isn't there anymore. It says "congratulations..... you are already a premium member"
@gdagod24 Sorry for the trouble with your Premium Family plan.
You should be able to manage your subscription as long as you are logged into the main account.
To invite someone to your family plan or manage your plan:
+++++++++++++++++++++++++
I've also created a ticket with our support team for you.
They will be contacting you privately via email to help look into this further, so please keep an eye out for their message.
Thanks for your patience in the meantime!
I have this same exact issue and for some reason your tech help decided I needed to reset my password instead of solving the issue of not being able to access to manage family page.