Missing save button on advanced page

The save button appears to be missing from the Advanced page. At the bottom there’s an option to Refresh Page, but not an option to Save Changes. I’ve attempted using both Chrome and Firefox.
I"m running FreePBX 12.0.70. I do have a few modules that need updating but I think I’m still based on the old Distro and therefore can’t update the Core or System Admin. Perhaps those would fix the error. I’m dealing with my mom’s stage 4 cancer currently and just can’t take on building a new system until that’s over. As I understand it, there’s no way to upgrade the system I’m on, it would require a new build.

If the problem was fixed in the new updates I’ll just leave the settings as they are for now.

In 12 there is no save button. You just click the check mark next to each item