There may be instances where, when you open the graph editor, only icons and an outliner will be drawn - this happens when Yeti is unable to find a valid Interactive license. 

Here are some potential reasons for this:

• The licensing is configured incorrectly, either you can't reach the main license server or the license server isn't running
• All of the interactive licenses have been used by others in your studio and you will need to wait until one becomes available
• the YETI_INTERACTIVE_LICENSE environment variable is set to 0, this variable can force Yeti to ignore Interactive license requests (Environment Variables & Configuration Files) if set to 0. If this is set on your system either ensure it's 1 or remove it all together (it's not needed by default).

In the event it isn't either of these please reach out to our support team for more help.