Inspect web in iphone from a mac does not work

I hope you can help me. I am trying to debug a page on my iphone 5. I have the device connected by usb to the mac, and I made the settings that I found necessary (attached prints). But when selecting the iphone apparently want to load the web inspector but it closes and on the iphone the message "A problem occurred with this web page, so it was updated" I do not know where the fault may be. I hope you give me a hand, thanks in advance. - settings - message in the iphone