Mokee center can not download OTA ROM

Mokee center can not download OTA ROM
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#1

My phone is Lenovo Zuk Z2PRO Z2121, MokeeOS7.1.2-181105-RELEASE.
I donated already for Incremental update.

But I can’t download OTA ROM.
This situation is from past version.

I am in china.
Either way, I can’t download it even with VPN or not.