Zwift crashed with error code 34

I use Macbook Air, Yosemite 10.10.5, and cant log in to ride on with crashed error code 34.
Is there anyone who can tell me what to do? thanks.

Hey Ken!

Error code 34 on a Mac means that you need more space on your hard drive. You may want to delete some stuff and empty your trash can!

If you have any more questions, let me know!