Wi-Fi authentication problem

The Android Wi-Fi authentication problem manifests when you unsuccessfully try to connect to a Wi-Fi network with the correct password. Rather than connecting and saving the password as would be the norm, the device delivers a notification beneath the network label saying that it’s authenticating. However, after a short wait, you see an ‘authentication problem’ or ‘authentication error’ notice.

How to fix the issue

I have two solutions to fix this issue. Either of these fixes will work in most situations but not always.
Solution 1

• Navigate to the Settings app on your phone then seek out Wi-Fi under Network connections.
• Under Wi-Fi Networks, find the network that you want to connect to and long press on its name or SSID. You’ll get a pop-up menu with two options: forget network and modify network config.
• Select the forget network option.
• Put some distance in between yourself and the Wi-Fi router until you are only getting one signal bar. Try to reconnect the same network and re-enter the password. If everything goes as it should be, you will be able to authenticate and connect to your network. If not, move on to Solution 2 below.

Solution 2
In case the above solution didn’t work and your device still isn’t able to connect, try the following.

• Navigate to the Settings app and choose Wi-Fi as above.
• Long press or hold the network that you want to access and then choose the modify network config in the pop-up menu that appears. In some devices, this option will be named as modify network connection.
• Check the box next to show advanced options and then seek out IP settings. Change from DHCP to Static. An IP Address field will appear below.
• Note down the information included in the static IP address field then delete it, re-enter it again, and save.

Hopefully, this should get everything sorted out so that you’re able to access Wi-Fi and the internet without any problems. If none of these options work, be sure to mention that in the comments section below, accompanied with your device model.