ADD a page

[Dr.CSS]

That is a really old version of CMSMS, you need to upgrade as older versions have known vulnerabilities that hackers are exploiting...

Go to Content > Pages and hit the Add Content link to add new pages, the side bar links can be done many ways, could be a global content block, in the page when editing, a menu call using items= parameter, so unless we were in the backend no way to tell how to add to them...