Zerotier cannot connect to the other devices

Yestoday my zerotier on my PC doesnot work , in the UI , it shows that REQUESTING_CONFIGUERTION , I uninstall the software and reinstall , it doesnot work still.
Just now it shows OK in the UI , but it doesnot work still.
I also check my networks page , it always cannot shows my Physical IP on the page , but shows that is online.
I also tried to deleted this device and add it again , it cannot work right still.
How can I fix my zerotier?