I am just curious, have you ever tried to search by yourself on Google? For example based on the error that is thrown you type on Google: WebDriverCurlException: Curl error thrown for http POST to /session and see what results it shows?
For me for example the first result has huge conversation for the same issue that happened on other folks: https://github.com/laravel/dusk/issues/588
So basically you've got to check your chrome version or install the latest if you haven't done what the documentation says: php artisan dusk:chrome-driver
https://laravel.com/docs/8.x/dusk#managing-chromedriver-installations
It takes a little bit of effort before posting here to check the other options, this is just a suggestion as that's much better way to learn, then just throwing an error and someone from here solving it for you, tomorrow you won't know what happened again.
Here is the same question on laracasts as well> https://laracasts.com/discuss/channels/testing/dusk-curl-error-thrown-for-http-post