I installed the car attributes plugin but when I post the ads it gives me an error.
The screen is white only with this error and the site no longer works.
I have installed on localhost osclass 4.2 with php 7.3

Fatal error: Uncaught PHPMailer\PHPMailer\Exception: Could not instantiate mail function. in C:\xampp\htdocs\osclass\oc-includes\vendor\phpmailer\phpmailer\src\PHPMailer.php:1825 Stack trace: #0 C:\xampp\htdocs\osclass\oc-includes\vendor\phpmailer\phpmailer\src\PHPMailer.php(1603): PHPMailer\PHPMailer\PHPMailer->mailSend('Date: Thu, 7 Ja...', '<p>Hi dan,</p><...') #1 C:\xampp\htdocs\osclass\oc-includes\vendor\phpmailer\phpmailer\src\PHPMailer.php(1437): PHPMailer\PHPMailer\PHPMailer->postSend() #2 C:\xampp\htdocs\osclass\oc-includes\osclass\utils.php(538): PHPMailer\PHPMailer\PHPMailer->send() #3 C:\xampp\htdocs\osclass\oc-includes\osclass\emails.php(435): osc_sendMail(Array) #4 C:\xampp\htdocs\osclass\oc-includes\osclass\classes\Plugins.php(40): fn_email_new_item_non_register_user(Array) #5 C:\xampp\htdocs\osclass\oc-includes\osclass\helpers\hPlugins.php(31): Plugins::runHook('hook_email_new_...', Array) #6 C:\xampp\htdocs\osclass\oc-includes\osclass\ItemActions.php(603): osc_run_hook('hook_email_new_...', Array) #7 C:\x in C:\xampp\htdocs\osclass\oc-includes\vendor\phpmailer\phpmailer\src\PHPMailer.php on line 1825

@danads
"Fatal error: Uncaught PHPMailer\PHPMailer\Exception: Could not instantiate mail function"

That means your mail server is not configured properly and throws error.

Ok Thanks
How to make settings for local host on laptop?
I didn't find anything on the net just like it does live, not on localhost.

Discuss with your hosting provider.

Is not on hosting on internet is on the my laptop, on XAMPP the osclass
Here I have to set as you saw the address in the picture.

http://localhost/osclass/oc-admin/index.php?page=settings&action=mailserver

@danads
Then it's your issue.

Ok I know, but I don't know how to set it.
I want to work on xampp first and then install on the net.
Can you help me please?

@danads
I cannot, not working on localhost nor with localhost