Cant lock agenda

Hello, I want to lock the meeting agenda as site admin, after a check the option it comes back blank again, doesnt save the check

thank you

What is your club number, without it we can do nothing for you.

What date is the agenda for that you are having the issue with?

3098, all of my agendas

i do this
login as web site admin
go to meeting agenda
go to any future agenda
go to edit this meeting agenda button
go to agenda setup tab
check on lock this agenda
save and close
go back to see the check
found unchecked
thank you

Can somebody answer my question please?