WeMos D1 will not connect to WPA2-Enterprise AP and throws IllegalInstructionCause before wdt reset

[Kfried]

I'm having no luck whatsoever connecting to our WiFi WPA2 Enterprise network. I've tried everything I can think of, I thought it may be an issue with the WDT but I'm not so sure. I have stack trace but I'm not confident in understanding it. Please if anyone can see something that I cannot then let me know. Many thanks

Hardware

Hardware: WeMos D1 Mini
Core Version: 2.4.0

Description

When I run the code the only output I get is :
Attempting connection
Wifi station connect status: ConnectionLost
ConnectionLost
...
Exception (0):
epc1=0x74754120 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

ctx: sys
sp: 3ffffb80 end: 3fffffb0 offset: 01a0

Sketch

#include <ESP8266WiFi.h>
#include "user_interface.h"
#include "wpa2_enterprise.h"

const int RED_LIGHT = 4;
const int GREEN_LIGHT = 5;


void setup() {
  pinMode(LED_BUILTIN, OUTPUT);   
  pinMode(GREEN_LIGHT, OUTPUT); 
  pinMode(RED_LIGHT, OUTPUT);

  Serial.begin(115200);
  

  //Set D1 to station mode
  wifi_set_opmode(0x01);
 
  //connect
  wdt_disable();
  wdt_enable(WDTO_8S);
  
  set_station_config();
  
  bool availableNetworks = CheckNetworksAvailable();
  
  connect_to_network();
  
  int errorTryCount=0;
  String currentStatus ="";
  String statusRecord="";
  
  while(WiFi.status() != WL_CONNECTED){
    wdt_reset();
    Inialising();
    currentStatus = ConnectionStatusString();
    if(statusRecord==""){
     statusRecord = currentStatus;
     Log(currentStatus);
    }
    if(currentStatus==statusRecord){
      LogInline(".");
      errorTryCount++;
      if(errorTryCount==100)
      {
        errorTryCount=0;
        Log("Reconnect Attempt");
        connect_to_network();
      }
    }
    else
      {
        Log(currentStatus);
        statusRecord=currentStatus;
      }
    delay(10);
  }
  
  void set_station_config(void)
{
  char ssid[32]="xxxxxx";
  char username[64] ="xxxxxx";
  static const char* password = "xxxxxx";

  struct station_config stationConf;
  os_memcpy(&stationConf.ssid,  ssid, 32);
  wifi_station_set_config(&stationConf);

  //wifi_station_clear_cert_key();
  //wifi_station_clear_enterprise_ca_cert();

  wifi_station_set_wpa2_enterprise_auth(1);
  wifi_station_set_enterprise_username((uint8*)username, strlen(username));
  wifi_station_set_enterprise_password((uint8*)password, strlen(password));
    
}
 
 void connect_to_network(){
  Log("Attempting connection"); 
  wifi_station_connect();
  Serial.print("Wifi station connect status: ");
  Serial.println(ConnectionStatusString());
}

bool CheckNetworksAvailable()
{
  Log("Scanning for Networks");
  int n = WiFi.scanNetworks();
  if(n==0){
    Log("No networks found");
    return false;
  }
  else{
    Log("Networks are available");
    Log("Networks seen:");
    for(int thisNet = 0; thisNet<n; thisNet++){
      String netCount = String(thisNet);
      String logString =netCount+") Network: "+WiFi.SSID(thisNet);
      Log(logString);

    }
    return true;
  }
 }

Debug Messages

3ffffd20:  2d207974 4b314c20 0000202c 3fff4d46  
3ffffd30:  3fff5187 3fff4d4a 00010030 00000010  
3ffffd40:  00000551 3fff4d4a 3fff651c 4022ac5b  
3ffffd50:  3fff2ac8 00000555 3fff4d46 a4cf820e  
3ffffd60:  40229837 3fff2954 00000000 3ffffdd0  
3ffffd70:  40211f1c 3fff4d46 00000000 00000555  
3ffffd80:  3fff2ac8 0000140e 3fff614e 3fff614a  
3ffffd90:  40229fae 00000016 3fff2954 3ffffdd0  
3ffffda0:  0000146f 00000000 3fff2954 00001420  
3ffffdb0:  3fff4d3c 40228e53 3fff2954 3fff4d3c  
3ffffdc0:  3fff614e 3fff26b8 00000000 40228dec  
3ffffdd0:  00001412 0000064c 00000016 3ffffe30  
3ffffde0:  3ffffe38 00000000 3ffffe34 4022889c  
3ffffdf0:  3ffffe70 3fff2714 3fffff10 00000000  
3ffffe00:  3fff2958 3fff4d3c 3fff2a48 3fff4d27  
3ffffe10:  3fff4d3c 3fff3907 00001417 3fff38b8  
3ffffe20:  00000000 3ffee440 3ffef5c8 40223fb6  
3ffffe30:  00000000 3fff285c 000000dd 3ffffe60  
3ffffe40:  40226bde 4022885c 3fff285c 3fffff10  
3ffffe50:  40226c57 3fff285c 3fff2714 00000100  
3ffffe60:  000000dd 000000dd 3fff37be 00000000  
3ffffe70:  00000000 3ffffec8 40226dca 3fff285c  
3ffffe80:  3fff38ac 013595a5 3fff2714 3ffffec0  
3ffffe90:  0000001d 00000001 00000019 3fff2714  
3ffffea0:  00000000 3ffffec8 40226324 3fff285c  
3ffffeb0:  000000dd 3ffffec8 0000000e ffffffff  
3ffffec0:  000000dd 00000001 00000000 00000000  
3ffffed0:  feefeffe 3fff02e0 3fff02e0 fffffffe  
3ffffee0:  000000fb 3fff1c0c 3fff37be 3fff37b8  
3ffffef0:  0000001d 40224c89 3fff2714 3fff37ac  
3fffff00:  3fff37b8 3ffef5c8 000000e3 3fff37ac  
3fffff10:  00000000 00000003 00000000 00000001  
3fffff20:  00000019 3fff37ac 40224d39 ffffffff  
3fffff30:  3ffeed7c 00000008 ffffffff 3ffeed7c  
3fffff40:  3fff2714 4021c7a3 3ffee440 3fff37ac  
3fffff50:  3ffeb8d0 0000010d 00000000 00000022  
3fffff60:  00000002 0000001a 40230543 3ffee440  
3fffff70:  3ffeb8c4 3fffdcc0 3ffeaa60 3ffeaa60  
3fffff80:  00000080 3ffee440 00000000 3fff0590  
3fffff90:  4022fe1f 3fffdab0 00000000 40203443  
3fffffa0:  3ffeaa60 40000f49 3fffdab0 40000f49 

0x4022ac5b: tls_parse_cert at ?? line ?
0x40229837: tlsv1_client_set_time_checks at ?? line ?
0x40211f1c: crypto_hash_update at ?? line ?
0x40229fae: tlsv1_client_process_handshake at ?? line ?
0x40228e53: tlsv1_client_handshake at ?? line ?
0x40228dec: tlsv1_client_handshake at ?? line ?
0x4022889c: tls_connection_handshake2 at ?? line ?
0x40223fb6: wpabuf_resize at ?? line ?
0x40226bde: eap_peer_tls_derive_session_id at ?? line ?
0x4022885c: tls_connection_handshake at ?? line ?
0x40226c57: eap_peer_tls_derive_session_id at ?? line ?
0x40226dca: eap_peer_tls_process_helper at ?? line ?
0x40226324: wpa2_get_time at ?? line ?
0x40224c89: eap_sm_process_request at ?? line ?
0x40224d39: wpa2_sm_rx_eapol at ?? line ?
0x4021c7a3: sta_input at ?? line ?
0x40230543: pp_tx_idle_timeout at ?? line ?
0x4022fe1f: ppPeocessRxPktHdr at ?? line ?
0x40203443: loop_task