Comment 61 for bug 1748839

I also have the problem with 18.04.4 LTS (up to date at time of writting). It seems to be related to the Wifi infrastructure since the problem appeared for me a few months ago (running successfully from May 2018 to Oct 2019).
However many other devices can connect successfully to the Wifi Infrastructure so there should be an incompatibility with it.
The problem is with the following Auth: WPA2 Enterprise, PEAP, No CA check, automatic PEAP version, MSCHAPv2.

Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: SME: Trying to authenticate with F2-28-3C-99-C2-78 (SSID='ACME-staff' freq=5220 MHz)
Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: Trying to associate with F2-28-3C-99-C2-78 (SSID='ACME-staff' freq=5220 MHz)
Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: Associated with F2-28-3C-99-C2-78
Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-STARTED EAP authentication started
Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-SUBNET-STATUS-UPDATE status=0
Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PROPOSED-METHOD vendor=0 method=25
Feb 1 12:21:34 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-METHOD EAP vendor 0 method 25 (PEAP) selected
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PEER-CERT depth=0 subject='***HIDDEN****' hash=2ac69dd2691f34f4408106fa96dd4da66dca716d3068cc33f54d1c8887cc325a
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PEER-ALT depth=0 DNS:***HIDDEN****
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PEER-ALT depth=0 DNS:***HIDDEN****
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PEER-CERT depth=0 subject='***HIDDEN****' hash=2ac69dd2691f34f4408106fa96dd4da66dca716d3068cc33f54d1c8887cc325a
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PEER-ALT depth=0 DNS:***HIDDEN****
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-EAP-PEER-ALT depth=0 DNS:***HIDDEN****
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: OpenSSL: tls_connection_decrypt - Decryption failed - SSL_read error:00000000:lib(0):func(0):reason(0)
Feb 1 12:21:35 ubuntu wpa_supplicant[1203]: SSL: Failed to decrypt Phase 2 data
Feb 1 12:21:59 ubuntu wpa_supplicant[1203]: wifi: CTRL-EVENT-DISCONNECTED bssid=F2-28-3C-99-C2-78 reason=3 locally_generated=1
Feb 1 12:22:11 ubuntu wpa_supplicant[1203]: FT: Invalid key management type (1)

So there is definitely a problem in LTS which is still not fixed.