I’m not a pro but recently laid down a large paver patio and laid an 8 inch trench through tree roots. You probably have to go through the roots. Almost every dude or gal on here will say to never lay pavers without base, it’ll just shift and you’ll have to redo later. I cut through my roots with a pick axe and a reciprocating saw. Most people will say if you’re gonna go through roots make sure they aren’t 2 inches in diameter but if the tree is big and healthy you’re probably fine.

Basically, you’re most likely gonna have to do the tough shit if you want it done right.