Hi @brandodd 

For troubleshooting purposes, could you please confirm whether you're attempting this using Microsoft Edge or Google Chrome?

The Lucid Webapp should open a new diagram in a separate tab regardless of the browser used.

Hope this helps - Happy to help further!!
Thank you very much and have a great one!
Warm regards

Hi @brandodd, thank you for posting in the community. Just adding on to what @Humas1985 shared, I would recommend trying the troubleshooting steps outlined in this help center article.

If the issue persists, could you please share the following information so we can take a closer look?

• A screenshot of the associated Javascript Console output after reproducing the issue. You can open your Javascript Console by pressing Ctrl+Shift+J (if your computer is a Windows/Linux) OR Cmd+Opt+J (if your computer is a Mac).

Thank you in advance and please let us know if you have any questions!