Chen states that the fourth Dalai Lama Yonten Gyatso was granted the title "Master of Vajradhara" and an official seal by the Wanli Emperor in 1616. This was noted in the Biography of the Fourth Dalai Lama, which stated that one Soinam Lozui delivered the seal of the Emperor to the Dalai Lama. The Wanli Emperor had invited Yonten Gyatso to Beijing in 1616, but just like his predecessor he died before being able to make the journey.
Why didn't Yonten Gyatso make it to Beijing? (If the question is unanswerable, say "unanswerable")
he died