Data Center Read-only Mode

If you are using Confluence Data Center and your administrator has temporarily switched your instance to DC Read-only mode, you may notice
changes to the behavior of Forms for Confluence. These behaviors are displayed only while your instance is in read-only mode.

Submit button is disabled in all forms

Remember that you cannot edit or create Confluence pages in read-only mode.

See Atlassian's Using Read-only Mode for Site Maintenance to learn more about general Confluence use in DC read-only mode.