Problem

After about a week of troubleshooting the classic SharePoint Online blog subsite template (BLOG#0), I was FINALLY able to figure out why I could not edit the homepage.

Solution:

There is a site feature called “Site Pages” that needs to be activated. Once activated, you can edit the blog homepage (assuming you have permissions).

Figure 1- Activate the Site Pages feature on your Blog Site in SharePoint Online. Now you can edit the blog homepage!

Figure 2- SharePoint Online Blog Site Edit button fixed

BAM!

Figure 3- The SharePoint Online Classic Blog template is now editable for the homepage. The About this blog image can be removed.

I was lucky to run across this when troubleshooting why a modern SPFx extension would not show on a classic homepage.

Hope this helps!

Similar issues:

• https://social.technet.microsoft.com/Forums/office/en-US/90647336-53ac-46a3-84d4-881d3c86cb92/cant-edit-sharepoint-2013-site-page?forum=sharepointadmin
• https://answers.microsoft.com/en-us/msoffice/forum/msoffice_sharepoint/cant-edit-page-in-office-365-sharepoint-blog-site/a5790bf1-dd90-42c2-a506-5f76e8357fe7
• https://sharepoint.stackexchange.com/questions/208281/edit-properties-is-greyed-out-for-a-blog