I’ve had this issue before with Draw Xray addon and PolyQuilt, I think he fixed it in 2.81 a few versions ago
But now again in 2.82 using his Polyquilt and your Draw Xray causes a crash as soon as I click
Do you think you could attempt to have them work together? Unsure if maybe you can spot something to have them work together properly without conflicting.
His addon is a great retopo tool and would pair well with yours.