php artisan serve: Failed to Listen on 127.0.0.1:8000 (reason: ?)

The most common mistake with this error is assuming port 8000 is busy and trying --port=8001 , then 8002 , then 8080 , and getting the same error every time. When php artisan serve (failed to listen on 127. 0.

Source: [Dev.to](https://dev.to/faizan050/php-artisan-serve-failed-to-listen-on-1270018000-reason--1ghm)