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Ubuntu 20.04.3 "Authentication required" loop on 2.4GHz network

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I am fairly new to the world of Ubuntu and I am having the following problem: When connecting to a 2.4GHz network I am unable to connect and am stuck on an "Authentication required" loop that asks me to enter a password for the wireless network. I am 100% certain it is the correct password. A suggestion to use the "WPS" button also failed. However, the same router also has a 5GHz network available and I am able to successfully connect to that 5GHz network. Sadly, as it is a 5GHz network, its reach is not sufficient and I would be much better off using the 2.4GHz network, that... I am unable to connect to. Also, I am able to connect to a hot spot created on a mobile device. Is there anything I can do to fix this issue?

Edit 1: The window says, I quote:

Authentication required

Passwords or encryption keys are required to access the wireless network "[Network name]"

Edit 2: I pulled out an old USB Wireless Network Card, it was capable of connecting to the 2.4GHz network. While that technically solves the issue, I consider this a bandaid. I would still like to solve the issue with the main built-in network card

Nmath avatar
ng flag
Is the "authentication required" for superuser privileges or is it asking for the WiFi password?
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It says: "Authentication required Passwords or encryption keys are required to access the wireless network "[Network name]"" @Nmath
Nmath avatar
ng flag
Doesn't sound familiar. Can you upload a screenshot? Have you tried removing the network and adding it again? Have you tried using your Ubuntu user's password? Have you checked router firmware settings?
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lv flag

for those in Ubuntu 23.04, you can restart "network-manager" on the command line with this:

sudo service NetworkManager restart

Sorry, I can't reply to @user140259.

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