When I tried to upload an RCT3 screenshot, it told me to change the file title to a JPG, PNG, or (something else), since it didn't accept BMP files. So I changed the extension (I know it was changed correctly b/c I searched up properties and it said it was a JPG file like it should be), and yet when I uploaded it, it still told me it was the wrong file type. Any help please? Thanks

just open it in paint or something and save it as a jpg