Hi @Jingli H,
Thank you for posting in the Lucid community! I am glad the issue was resolved.
If you run into this issue in the future, try opening your document in a private or incognito window. You can also try connecting to a different network or disconnecting from your VPN (if applicable). Sometimes account performance issues can be related to internet security/speed or browser issues.
Feel free to reach out again with a screenshot of the issue and a screenshot of the associated Javascript Console output when it’s reproduced if you continue to run into issues.