New Fleet Commonality is now activated in this game world. Let me know if you encounter any issues.
You can still temporarily access the old page by adding the "?oldPage" query at the end of the page URL, e.g. https://www.airwaysim.com/Game/485/FleetCommonality?oldPage
Also note. If your airline operates DC-10/MD-11, it seems that in old commonality the training costs have been counted as too low for that fleet. Do not be surprised if there's a slight jump.