Thanks for your quick reply. Yes, I opened an issue in Github.
I used "jupyter labextension install jupyterlab_apod-2.0" to install this extension.
File "/Users/mariolzx/opt/anaconda3/envs/jupyterlab-ext/lib/python3.8/site-packages/jupyterlab/commands.py", line 541, in get_latest_compatible_package_versions
return handler.latest_compatible_package_versions(names)
File "/Users/mariolzx/opt/anaconda3/envs/jupyterlab-ext/lib/python3.8/site-packages/jupyterlab/commands.py", line 1659, in latest_compatible_package_versions
for version, data in sorted(versions.items(),
AttributeError: 'list' object has no attribute 'items'
[W 00:34:01.164 LabApp] Unhandled error
[E 00:34:01.164 LabApp] {
"Host": "localhost:8889",
"Connection": "keep-alive",
"Authorization": "token 9036729e7e9169af148077e9013f87175c6a321bfdd7c2ed",
"Sec-Fetch-Dest": "empty",
"X-Xsrftoken": "2|c7bf5288|ad42adaaeaf06d907f6001d1362da6c1|1584587174",
"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36",
"Dnt": "1",
"Content-Type": "application/json",
"Accept": "*/*",
"Sec-Fetch-Site": "same-origin",
"Sec-Fetch-Mode": "cors",
"Accept-Encoding": "gzip, deflate, br",
"Accept-Language": "en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7",
"Cookie": "_xsrf=2|c7bf5288|ad42adaaeaf06d907f6001d1362da6c1|1584587174; username-localhost-8888=\"2|1:0|10:1584670862|23:username-localhost-8888|44:YzM2M2YwMWEzNDIzNGExOGJkNmYzNDc4N2FlNjQxMWE=|94b8e91ab6b726d54eebae3e8a07699302286bec38506357e26c5c7268e29894\"; username-localhost-8889=\"2|1:0|10:1584851640|23:username-localhost-8889|44:N2RiMzgxODc3NDRkNGQ5NzliN2ZjOTg0NWVkOWQ5MGY=|ce448ab07f719f6df24d3924e946a8d6116c84f18ab5f79139e5c3af97613cd8\""
}