[ 5236][E][WiFiClient.cpp:313] setSocketOption(): fail on -1, errno: 9, "Bad file number"

[chan0722]

Describe the bug
I'm not sure why this error occurs, because I can connect to my websocket in postman, but there is no way to connect to my websocket in esp32.

To Reproduce
Steps to reproduce the behavior.
This should include:

• The library version you are using -> gilmaimon/ArduinoWebsockets@^0.5.3
• The board you are using ->ESP32 DEVKITV1
• Information about other components in the system (do you use third party client/server software?) -> websocket runs in render

Expected behavior
Hope the author can help

Code
#include <Arduino.h>
#include <ArduinoWebsockets.h>
#include <WiFi.h>

const char* ssid = "Xiaomi12T"; //Enter SSID
const char* password = "1234567890"; //Enter Password
const char* websockets_server_host = "ws://fipt.onrender.com"; //Enter server adress
const uint16_t websockets_server_port = 3000; // Enter server port

using namespace websockets;

WebsocketsClient client;
void setup() {
Serial.begin(115200);
// Connect to wifi
WiFi.begin(ssid, password);

// Wait some time to connect to wifi
for(int i = 0; i < 10 && WiFi.status() != WL_CONNECTED; i++) {
    Serial.print(".");
    delay(1000);
}

// Check if connected to wifi
if(WiFi.status() != WL_CONNECTED) {
    Serial.println("No Wifi!");
    return;
}

Serial.println("Connected to Wifi, Connecting to server.");
// try to connect to Websockets server
bool connected = client.connect(websockets_server_host, websockets_server_port, "/");
if(connected) {
    Serial.println("Connected!");
    client.send("Hello Server");
} else {
    Serial.println("Not Connected!");
}

// run callback when messages are received
client.onMessage([&](WebsocketsMessage message){
    Serial.print("Got Message: ");
    Serial.println(message.data());
});

}

void loop() {
// let the websockets client check for incoming messages
if(client.available()) {
client.poll();
}
delay(500);
}

Additional context
This is the output I got：
..Connected to Wifi, Connecting to server.
[ 5207][E][WiFiClient.cpp:313] setSocketOption(): fail on -1, errno: 9, "Bad file number"
Not Connected!

[MaxTMcCoy]

Same issue I'm also using 0.5.3

[syderbit]

you can try with

const char* websockets_connection = "ws://fipt.onrender.com";
client.connect(websockets_connection );