Why am I receiving a 404 bad request and 443 timeout error in PHP auth API?

Shopify Apps
1

Hello Team,

I am facing a problem in POST admin/oauth/access_token api.

Code is:

‘POST’,
“https://{$store}/admin/oauth/access_token”,
[
‘form_params’ => [
‘client_id’ => $api_key,
‘client_secret’ => $secret_key,
‘code’ => $query[‘code’]
],
]

and auth url is : $url = "https://{$store}/admin/oauth/authorize?client_id={$api_key}&scope={$scopes}&redirect_uri={$redirect_uri}&state={$nonce}&grant_options={$access_mode}

error is: 443 timeout and sometimes 404 bad request

Please help me..