Hello,
Yesterday for the first time, right after click 'go to flight' button press, I had Camera button that instead of being red, was white and was impossible to shoot...

Problem was solved by a reboot of both RC (I have Phantom 4 Pro Plus with built in screen) and Phantom.
Few minutes later a similar thing but in this case the white button had also a '5s' inside it, something similar an auto-shoot timer...
Again, after rebooting everything came back to original red button.


Please what does they mean?

Weird, the app has updated recently, could be a limitation of the card youre using, takes a bit to initialise?? just guessing but seen as you had no replies i thought i would take a punt,  perhaps opening a ticket with support  may be prudent choice in this regard?

That 5s means that the camera is taking pictures every 5 seconds. Just change back to single shot, burst, AEB or whatever you prefered method is

Aloha Federico,

     Beside the suggestions of Bashy and Chava, you can also reset the camera to default values and start over again with your settings.  But, Chava is directly addressing your situation.

Aloha and Drone On!