异常 28：LoadProhibited：加载引用的页面映射的属性不允许加载

如何解决异常 28：LoadProhibited：加载引用的页面映射的属性不允许加载

我正在尝试在 Arduino IDE 1.8.15 上的 Windows 中使用 NodeMCU ESP-12E ESP8266 作为 coap 客户端，但它一直在控制台中给我异常 28 错误，我不知道是什么问题，因为我是对这些 arduino 的东西还是有点陌生​​，我到处搜索但没有运气，因此我无法取得任何进展，希望得到任何帮助。

代码和错误如下，它是库中的示例代码，我什么都没改变

这是我使用的库 - Here。

ESP-COAP Client
*/
#include <ESP8266WiFi.h>
#include "coap_client.h"

//instance for coapclient
coapClient coap;

//WiFi connection info
const char* ssid = "ttssid";
const char* password = "12345";


//ip address and default port of coap server in which your interested in
IPAddress ip(127,1);//take ETH Zurich or coap.me server to run and check client 
int port =5683;

// coap client response callback
void callback_response(coapPacket &packet,IPAddress ip,int port);

// coap client response callback
void callback_response(coapPacket &packet,int port) {
    char p[packet.payloadlen + 1];
    memcpy(p,packet.payload,packet.payloadlen);
    p[packet.payloadlen] = NULL;

    //response from coap server
 if(packet.type==3 && packet.code==0){
      Serial.println("ping ok");
    }

    Serial.println(p);
}

void setup() {
   
    Serial.begin(115200);

    WiFi.begin(ssid,password);
    Serial.println(" ");

    // Connection info to WiFi network
    Serial.println();
    Serial.println();
    Serial.print("Connecting to ");
    Serial.println(ssid);
    WiFi.begin(ssid,password);
    while (WiFi.status() != WL_CONNECTED) {
    //delay(500);
    yield();
    Serial.print(".");
    }
    Serial.println("");
    Serial.println("WiFi connected");
    // Print the IP address of client
    Serial.println(WiFi.localIP());

    // client response callback.
    // this endpoint is single callback.
    coap.response(callback_response);

    // start coap client
    coap.start();

    //get request to server (arguments ip adrress of server,default port,resource(uri))
    int msgid = coap.get(ip,port,"light");

    //observe request (arguments ip adrress of server,deafult port,resource name,interger(0) ) 
    //int msgid= coap.observe(ip,"light",0);

    //reset observe cancel
    //int msgid=coap.observecancel(ip,"resoucename");
    
}
//int i=0;

void loop() {
    bool state;
 
    // Requests

    //get request
    //int msgid = coap.get(ip,"hello");

    //put request 
    //arguments server ip address,payload,payloadlength
    //int msgid =coap.put(ip,"resourcename","0",strlen("0"));

    //post request
    //arguments server ip address,payloadlength
    //int msgid =coap.post(ip,strlen("0"));

    //delete request
    //int msgid = coap.delet(ip,"resourcename");

    //ping
    //int msgid=coap.ping(ip,port);
    
    // int msgid=coap.observe(ip,"obs",0);
  
    state= coap.loop();
    // Serial.print("state=");
    //Serial.println(state);
    //if(state==true)
          //i=i+1;
  
    //Serial.print("i=");
    //Serial.println(i);
      //if(i==3)
    //{
        //Serial.println("cancel observe");
        //coap.observeCancel(ip,"resourcename");
    //}
  
    //Serial.println(msgid);
    delay(1000);
} 

Exception 28: LoadProhibited: A load referenced a page mapped with an attribute that does not permit loads
PC: 0x4000bf80
EXCVADDR: 0x0000008c

Decoding stack results
0x402019e0: coapClient::send(IPAddress,int,char*,COAP_TYPE,COAP_METHOD,unsigned char*,unsigned char,unsigned int,unsigned char) at C:\Users\ugur_\OneDrive\Belgeler\Arduino\libraries\ESP-CoAP-master\coap_client.cpp line 81
0x40203600: uart1_write_char(char) at C:\Users\ugur_\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266\uart.cpp line 949
0x4020373b: uart_write(uart_t*,char const*,size_t) at C:\Users\ugur_\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266\uart.cpp line 546
0x40201a70: coapClient::loop() at C:\Users\ugur_\OneDrive\Belgeler\Arduino\libraries\ESP-CoAP-master\coap_client.cpp line 191
0x4020825b: rand at /workdir/repo/newlib/newlib/libc/stdlib/rand.c line 79
0x40201a3c: coapClient::get(IPAddress,char*) at C:\Users\ugur_\OneDrive\Belgeler\Arduino\libraries\ESP-CoAP-master\coap_client.cpp line 29
0x401008cc: malloc(size_t) at C:\Users\ugur_\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266\umm_malloc\umm_malloc.cpp line 821
0x40100274: pvPortMalloc(size_t,int) at C:\Users\ugur_\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266\umm_malloc/umm_heap_select.h line 85
0x40201a70: coapClient::loop() at C:\Users\ugur_\OneDrive\Belgeler\Arduino\libraries\ESP-CoAP-master\coap_client.cpp line 191
0x402021f8: Print::println() at C:\Users\ugur_\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266/Print.h line 57
0x402017c7: coapClient::start() at C:\Users\ugur_\OneDrive\Belgeler\Arduino\libraries\ESP-CoAP-master\coap_client.cpp line 24
0x4020118a: setup() at C:\Users\ugur_\AppData\Local\Temp\arduino_modified_sketch_4606/coapclient.ino line 67
0x40202934: loop_wrapper() at C:\Users\ugur_\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266\core_esp8266_main.cpp line 198

 ets Jan  8 2013,rst cause:2,boot mode:(3,6)

load 0x4010f000,len 3460,room 16 
tail 4
chksum 0xcc
load 0x3fff20b8,len 40,room 4 
tail 4
chksum 0xc9
csum 0xc9
v00043a80
~ld