I have a wordpress website in the root folder. I've installed a work in progress website that will be in the root folder.
When I try to upload some files (images) there are some files that are uploaded smoothly and other that throws error.
The images are quite the same, so I can't get why this happen.
For example: I have 2 images, 18kb each, jpg extension. One is uploaded, the second one not. And I've tried several times with several fields.
I see a 403 error in the console. Why this is happen? How to debut this kind of error?