HTTP/1.1 202 Accepted Error

I have a NANO with an ENC28J60 Ethernet board

I am making a HTTP request to a home automation box from a Fibaro (HC2) Most of the time this goes well. But often I got an error in the serial monitor with:

HTTP/1.1 202 Accepted // first time pushed from the home-automation to the Nano I got this response

HTTP/1.1 202 Accepted // second time i got this response
GET /?relay2on HTTP/1.1
Making HTTP Request HC2 - Relay2 Status ON

I would think the correct response should be:
GET /?relay2on HTTP/1.1
Making HTTP Request HC2 - Relay2 Status ON
without HTTP/1.1 202 Accepted !!

Where can i find this bug? part of the sketch below:

void loop() {
EthernetClient client = server.available();

if (client) {

while (client.connected()) {
if (client.available()) {

char c = client.read();

// read char by char HTTP request
if (readString.length() < 50) {
//store characters to string
readString += c;
Serial.print(c);
}

// if HTTP request has ended
if (c == ‘\n’ ) {

// send a standard http response header
client.println(F(“HTTP/1.1 200 OK”));
client.println(F(“Content-Type: text/html”));
client.println(F(“Connection: close”));
client.println();

// *** Relay Control Buttons *** //

// Relay 1 control buttons
if (readString.indexOf("?relay1on") >0){
digitalWrite(Relay1, LOW);
Relay1_ON(client);
}
if (readString.indexOf("?relay1off") >0){
digitalWrite(Relay1, HIGH);
Relay1_OFF(client);
}

// Relay 2 control buttons
if (readString.indexOf("?relay2on") >0){
digitalWrite(Relay2, LOW);
Relay2_ON(client);
}
if (readString.indexOf("?relay2off") >0){
digitalWrite(Relay2, HIGH);
Relay2_OFF(client);
}

// Relay 3 control buttons
if (readString.indexOf("?relay3on") >0){
digitalWrite(Relay3, LOW);
Relay3_ON(client);
}
if (readString.indexOf("?relay3off") >0){
digitalWrite(Relay3, HIGH);
Relay3_OFF(client);
}

// Relay 4 control buttons
if (readString.indexOf("?relay4on") >0){
digitalWrite(Relay4, LOW);
Relay4_ON(client);
}
if (readString.indexOf("?relay4off") >0){
digitalWrite(Relay4, HIGH);
Relay4_OFF(client);
}

delay(1);
client.stop();

readString="";

} // if (c == ‘\n’ )

} // client avaiable
} // while client connected

} // if client

// *** Switch State Input HTTP Requests *** //

// Get Switch State 1 and send HTTP request to HC2
SwitchState_1 = digitalRead(Input1);
if (SwitchState_1 != lastSwitchState_1) {
if (SwitchState_1 == HIGH) {
Input1_OFF(client);
} else {
Input1_ON(client);
}
}
lastSwitchState_1 = SwitchState_1;

// Get Switch State 2 and send HTTP request to HC2
SwitchState_2 = digitalRead(Input2);
if (SwitchState_2 != lastSwitchState_2) {
if (SwitchState_2 == HIGH) {
Input2_OFF(client);
} else {
Input2_ON(client);
}
}
lastSwitchState_2 = SwitchState_2;

// Get Switch State 3 and send HTTP request to HC2
SwitchState_3 = digitalRead(Input3);
if (SwitchState_3 != lastSwitchState_3) {
if (SwitchState_3 == HIGH) {
Input3_OFF(client);
} else {
Input3_ON(client);
}
}
lastSwitchState_3 = SwitchState_3;

// Get Switch State 4 and send HTTP request to HC2
SwitchState_4 = digitalRead(Input4);
if (SwitchState_4 != lastSwitchState_4) {
if (SwitchState_4 == HIGH) {
Input4_OFF(client);
} else {
Input4_ON(client);
}
}
lastSwitchState_4 = SwitchState_4;

} // void

Added a quick photo from the serial monitor