Material asset not preview how can i fix it?

**D5 Render Version2.5.2

rtx3060 laptop
version2.5.2

materrial not preview*
Steps to Reproduce (optional):

Hi @samerpak.p

Sorry for that, if possible, you can switch a network or use VPN then check whether it can work.
Besides, hope you can run the support tool then send me the log file as well. Since this problem happens only to some specific internet service providers on different regions, we have to see the log to know why this issue happened.
D5 Support Tool - Get Help / Tech Support - D5 RENDER FORUM

Thanks for your comprehension! You can send the log to support@d5techs.com.

friendly,
ChanLee