Incorrect password for what? Would this be your AppleID Password, or WiFi Password (more likely)?
If you are seeing WiFi password failures, you should restart your WiFi Router. Whilst other devices may be connecting and operating as expected, your router may be blocking connection.
To restart you home router, disconnect power - then wait at least 30 seconds before restarting. When you router has rebooted (which may take several minutes), force-restart your iPad:
- On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
- On an iPad with Face ID: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.