Can I set Global Area permissions in 8.1?1 user found helpful
With Advanced Permissions enabled, there should be permissions available for each block in the stack and a Permissions button for the stack itself (in the stack toolbar under the stack name)
Dashboard > Stacks & Blocks > Stacks & Global Areas > click Global Areas > select a specific global area
I believe you can disable editing in the stack permissions.
Again, I'm able to edit the block permissions from this screen. They are all set to only allow administrators to make edits (see screenshot). But when I am logged in as another member group, I am still able to click on the block from the frontend edit page and select any of these options. However, it will cause a 500 error and a constant loading rather than actually bring up the edit form.
Is there somewhere else I can set permissions on the whole area so that they can't even click it, period?
I am not sure why the Permissions button for the stack is not displaying.
Are you logged in as admin?
Just to cover the bases, have you cleared your site cache?