I am trying to upload an EPS created on inkscape to a website and it is saying:

• EPS error: Your vector must not include embedded raster objects. Please modify the original file and retry the upload

I can't figure out what it is talking about or how to remove it

In the Find/Replace Pane, ( Edit>Find Replace)  you can use these settings and press apply to highlight all images in the document.

Any transparency/filtered pixel will be rendered as a raster image during save to EPS.

Thanks for the suggestions. I tried the image search as suggested and it says none found. The image is just a vector with one fill color, no gradients, filters, or transparencies. 

I'd try Menu: View>Display mode>Outlines... look for any red rectangles with crossing diagonals. Masks can also be embedded images.

Feel free to share an example Inkscape svg