Hey everyone I was getting the same error for the past few days, I tried contacting the site admin but no luck though i got a reply that due to the traffic on the website it can effect and you may consider relaunching the browser and all. So today I decided to do some troubleshooting by myself I tried different devices, changed connection, tried VPN as well no luck. I decided to pull up network logs and noticed that It uploads the content i.e image but then it crashes and redirects to request rejected url. My image size was not that much it was around 178 KB so I used an online image size reducer and you can find one from google. I reduced the image size to 40 KB without effecting on the quality of the image as it is the main thing when it comes to the dv lottery. After that I submitted my profile and volaa it did the trick. I got to the second page and I was then able to submit the profile. Y'all can try this solution on your own I'm not responsible if something happens it did the trick for me though so make sure you check the image quality and size everything before submitting.
Good luck everyone!!!!!