Many iPad and iPhone users have encountered a problem when, when connected to a saved Wi-Fi network, iOS shows
4 reasons for the error “Invalid password”
Before moving on to further instructions, take a few simple steps to eliminate other possible causes of this problem.
- Make sure you entered the correct password (check on another device - the password may have been changed)
- Make sure that you connect to the desired network (often in the same building there can be several networks with similar names, especially if they are set by default by the manufacturer of routers or a sysadmin)
- Check the case of letters in the password
- Make sure that you do not have Caps Lock or another keyboard (for example, French instead of English)