Hi @JianWang I am posting the solution identified by the CSS team on the thread here for the benefit of other community members.
Inspecting the configuration of your Azure portal it is found that your resource group name is in Chinese. According to the official API documentation -- Spatial Anchors Accounts - List By Resource Group, the name of the resource group is ^[-\w._()]+$ pattern to do match. Only most ASCII characters are supported, and Chinese Unicode characters may be ignored during matching. Resolving the naming of the resource to match the pattern resolved the issue.
I appreciate it if you can click Accept Answer and Yes for the answer provided above. Doing so would help other community members with similar issue identify the solution. I highly appreciate your contribution to the community.