Trouble Connecting to Wi-Fi Via GUI

I am having a small issue with my Wi-Fi adapter. It seems that the GUI interface is struggling to connect, so it does not automatically connect when I start the system. In order to connect, I have to open a command-line shell & execute the following command:

$ sudo iw dev  connect

So the credentials have been stored correctly. It just seems the GUI network manager is having some issues. I am running a 2007 MacBook Pro with Ubuntu MATE 19.04 x86_64. This is a fresh install.

$ lspci
...
0b:00.0 Network controller: Qualcomm Atheros AR5418 Wireless Network Adapter [AR5008E 802.11(a)bgn] (PCI-Express) (rev 01)
...

$ lsmod | grep -i ath
ath9k                 151552  0
ath9k_common           36864  1 ath9k
ath9k_hw              475136  2 ath9k_common,ath9k
ath                    36864  3 ath9k_common,ath9k,ath9k_hw
mac80211              806912  1 ath9k
cfg80211              671744  4 ath9k_common,ath9k,ath,mac80211

**Edit:** I apologize, I did forget to mention that my WiFi uses WPA2 Personal security.