Win10 get member version is a gray solution

This problem is likely to be caused by the system's privacy settings not meeting the requirements of the preview experience plan, which can be solved by the following settings:
Open System Settings — Privacy & mdash; Feedback and Diagnosis, will “ Send your device data to Microsoft” option set to “complete (recommended)”

Microsoft requires users who participate in the preview program to send complete diagnostic and usage data to Microsoft. After upgrading the preview, this option will automatically be set to “full” and cannot be changed. As shown below:

Another thing to remind users is that once you upgrade to the preview version, you will not be able to stop receiving member versions. If you want to quit, you need to reinstall the official Win10 system.