I was able to write/edit/see all the wikis on my site,

I was able to write/edit/see all the wikis on my site, directly on the site and from the dashboard. Now, all of sudden, I get an error message:

"Permission Denied
Not Found / No Access
The page you are looking for either does not exist, or you do not have the permissions to access it"

I can still edit the content through the dashboard but not see the page anymore