On a quick look can't see why you route in not a valid DONE4. Maybe an issue with the USA flights. Your itinerary has 15 segments ONE allows 16, so that's OK
A map from the Great Circle Mapper - Great Circle Mapper
DGLOB34 are distance based and have more allowable airlines. But you are not using those
https://www.oneworld.com/world-travel
Global Explorer
Distance-Based Air Travel
For an even wider choice of where to travel, book your Round The World trip via Global Explorer, which grants you access to an even more extensive list of airlines, including Aer Lingus, Bangkok Airways,
oneworld connectpartner
Fiji Airways, Jetstar, Jetstar Asia, Jetstar Japan, Jetstar Pacific, WestJet, and
Qantas code-share flights operated by Air Tahiti Nui.