When FusionManager docking with FusionAccess, you need to click the "temporary release protection" to fulfill docking.
1. Type “about:config” in the browser address bar and hit enter.
2. Click “I’ll be careful, I promise”
3. Enter “security.mixed_content.block_active_content” in the search bar.
4. Double-click the query result to change its value to false.
5. Restart the browser, re-login FusionManager and reconfigure.