Not able to use serial communication using ftdi programmer

Hello
I made an Arduino on breadboard and connected an ftdi programmer to upload the codes. The codes upload fine but when i tried serial communication the values do not get printed to the serial monitor. When i removed the dtr pin of the programmer then the serial communication works please help

Which Arduino?
We need to see a schematic/wiring diagram of how you have things connected and please post your code.

In the IDE click on Edit then on Copy for Forum, then come back here and just do a paste.

void setup() {
Serial.begin(9600);
}

void loop() {
Serial.println("Hello world!");
delay(1000); 
}

i made my own atmega328p based uno on a breadboard
https://docs.arduino.cc/retired/hacking/hardware/building-an-arduino-on-a-breadboard/
I followed this tutorial and did the connections according to it. then I connected the dtr pin to 10k resitor connected to 5v

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