Error “KeyError: '.zmetadata'” is reported when running “xmitgcm llcreader demo”

[Hana0002]

Dear xmitgcm community and any seniors who might be able to help me~

I am writing to seek assistance with a technical issue I have encountered while running “xmitgcm llcreader demo” with xmitgcm of python and jupyter of vscode.

I downloaded and used the demo you provided, and solved some problems with the package version. But I encountered the error "KeyError: '.zmetadata'". I didn't find a solution on the web. May I ask why this problem occurs? Is it because I'm running in the wrong environment?

I would greatly appreciate any guidance or suggestions you can provide to help me resolve this issue. Here's a screenshot of the errors I got from running the two demos separately.

Thank you in advance for your time and support. A sincere but green graduate student ～>_<～