You can create or update a page in the <space name + link> if your user is included in the group <space-contributors-Request access page>.
As the <space name + link> was created using the macro Brikit, when you want to maintain the space, you need to open the advance menu before starting.
Advance menu
Click on the button 
and then 
to display the usual menu of Confluence
Create a page
Click on the button 
to create a page
Update a page
Click on the button 
to maintain your page
