Post to Google My Business

I am trying to post a 360 shot of an internal space on Google My Business but it is not working. It does not recognize the image as 360. I tried to upload the same image to Google Street View but I am getting an error message "Unable to import 1 Photo.The image's size should be at least 3840x1920". Although I can see the image size is 4096 × 2048.