Details:
When uploading photos to the pages in the Site Builder, the file name of the photo
must not contain any spaces. To rename the file:
1. Right click on the file name in your local computer.
2. Select Rename, and then remove the space(s) in the file name.
3. Hit Enter to confirm the changes.
After renaming the file(s) successfully, you can then upload them to the pages you
build in the Site Builder.