I tried to run the source code on my desktop, and therefore, I set up the environment. But it shows an error.
Then I tried running it on Gitpod, which also showed the error.
What is the solution for this?
You really need to read all the docs properly please, and read this on how to report issues effectively:
So from the looks of your screen shot, you are not trying to build the Android app. That has it’s own instructions here:
https://developer.rocket.chat/docs/mobile-app
You are trying to build the whole Rocket.Chat server on Windows, and subsequently gitpod.
Windows
You need WSL 2 and AT LEAST 12Gb RAM
https://developer.rocket.chat/v1/docs/windows-10
Gitpod
If you also read carefully you will need to use the higher power gitpod server. You will also need to use the correct meteor version: