Hi @Manatsu Watanabe,

Thank you for reaching out! Others who experienced a similar issue found that clearing the cache and temporarily disabling browser extensions helped resolve the problem. Could you please ask the person in your training session who is facing this issue to try the same?

Here’s a helpful article for a step-by-step process: How to troubleshoot and report a bug

Let us know if this helps, and feel free to reach out if the issue persists!