Idk... just dont trust those pop-ups unless your device is acting weird.
Answer:
interference
Explanation:
The most likely reason for the connectivity problems is interference. This interference can be caused by many factors but in this scenario the most likely factor would be the metal studs and all the metal used to create the ceiling/floor. Metal is a huge interference when it comes to wifi signals. Depending on the type of metal and the amount it can greatly diminish the signal strength or even completely prevent the signal from passing to it's destination, regardless of how close the destination device is located.
Answer:
This is because the other person has "Focus Mode" turned on. When this is turned on, all of your messages that you send to him/her will be silenced.
Charles should type in Https:web.com but should visit the sites containing ".org,".Gov'" and make sure they've been updated recently.
He should also check for authors and dates.
Or he can go to a library online if he is doing a research paper.