WordPress Theme Rejected, Can't Submit Again

Just got this email from Envato in regards to my new template I uploaded for approval: Thank you for your submission. We have completed our review of “PlantLabs - Responsive WordPress Theme” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

There was no further reasoning.

Here is the preview link: https://plantlabs.themegrove.com/

Please assist! I’m very confused—first time author.