Thanks for reaching out in the community. Can you please try some troubleshooting steps to resolve the issue?
1. Clear your cache and cookies and log into your account again. Alternatively, you can open Lucidchart in a private or incognito window
2. Restart your operating system
3. Try a different browser and see if the issue persists
If these steps do not help please fill out this form, so that we can take a closer look.