You get a non-compliant rejection most likely because the file was rejected before for a reason you did not address before resubmitting. Based on your last question, I believe the moderators requested Pr (Property Release). This form need to be completed by the owner of properties of whom you upload a copy. If the vector was created by you, and a PR is requested, then you will fill out the form and sign as owner, and as artist. To find this form go your contributor page.
On the black menu bar, click on Uploaded files
Below the black bar, click on Releases
At the top right corner click on Create a release
Select from one of two form methods - Adobe sign for electronically processed document, or Upload a scanned release in which case you download and print the release form, fill it out, sign, have the signatures witnessed, and upload by going through the same process as described above (following the relevant instructions). The electronic document do not require witness signature.
Be sure to select property release for property. Model release goes with photos of people, including yourself.