It seems that PHP 7.4 is the latest version that this works in. PHP8 gets the following error, and doesn't send the mail:
[04-Mar-2021 16:53:28 UTC] PHP Warning: Attempt to read property "success" on null in public_html/xxx/index.php on line 73
This has to do with the Google Recaptcha portion of the code, where it verifies the secret key. I don't know PHP, so that's about as much I can help with..
It seems that PHP 7.4 is the latest version that this works in. PHP8 gets the following error, and doesn't send the mail:
[04-Mar-2021 16:53:28 UTC] PHP Warning: Attempt to read property "success" on null in public_html/xxx/index.php on line 73
This has to do with the Google Recaptcha portion of the code, where it verifies the secret key. I don't know PHP, so that's about as much I can help with..