This also happened to me when I was given a task from my company, Rent a Car Bur Dubai, and I compiled for it. So what I can recommend is:
Ensure that the correct board, "AI Thinker ESP32-CAM," is selected in the Tools menu of your Arduino IDE.
If the board is not listed, you may need to install it through the Board Manager. Search for "ESP32" and install the latest version.
Ensure that necessary libraries like ESP32-CAM, WiFi, and HTTPClient are installed. You can install them through the Library Manager.
Carefully check your code for typos, missing semicolons, or incorrect syntax.
Verify that you're using the correct function names and parameters.

@Vishnuraj2003 Are you able to fix it?

Hi @PumpedMedusa, The rage is depends on the Antenna and how much TX power you have.

To choose antenna, first you need figure out - where your nodes will be, take a look at the below image. The antenna act like a "torch" if you have more dbi that mean it's focus will be increase and it can reach more distance but the angle it have it less, like a laser.

also, obstacle such as buildings, tress and mountains will affect the signal and deplete it.

So, answer for you question - What is the best LoRa module to use for long distance network? - It's really depends on where you planning to put the nodes and how high you putting the gateway. Let me know know your thoughts.

@Parves-DOMINO Did you able to solve the issue?

@Parves-DOMINO Are you still facing the issue?