Always getting error 300404 (We could not access the media at URL)

When I try to do feed upload partial updates, I always get an error 300404 which has, I believe, something to do with images? Partial updates is supposed to update just the attribute you want to change right? (in my case I'm trying to update "color" attribute). I'm not sure why it is asking or considering the images when doing this.

Anyone else experiencing this crazy error? Appreciate the insights and how to avoid this. TY.

(We could not access the media at URL (google drive URL). A 404 HTTP status code was received. The media could not be found at the address provided. Ensure that the URL is correct and the media is publicly accessible.)