Shamim's Plugins

You need to get site key and secret key from google. Please see https://www.shamimsplugins.com/docs/advanced-nocaptcha-recaptcha/getting-started-advanced-nocaptcha-recaptcha/how-to-get-google-recaptcha-keys/

Let me know.

If you need refund don’t worry about it. I will full refund you.

Add following code in your theme’s (child theme’s if you are using) functions.php

add_filter( 'fep_get_option', function( $value, $option ) {
	if ( in_array( $option, ['can-send-to-group', 'allow_attachment'] ) ) {
		if( fep_is_user_admin() ) {
			return true;
		} else {
			return false;
		}
	}
	return $value;
}, 10, 2 );

This will allow to send group message and attachments only by admins.

May you explain “the user could only add himself to a specific group” a little more? Suppose you have 5 groups but you want your users can add themselves only specific 2 groups?

I visited your website and it seems this is not the actual code of your login form.
Please re-check you have added code in appropriate location.

Let me know.

May you please let me know following
1. Version of this plugin, wordpress and php
2. Activate query monitor plugin and see which query taking more time
3. Deactivate all other plugins and activate one of default theme (tweenty*) then test. If it is taking normal time then activate one by one and test.

I think UPT()->get_user_id() is receiver user id in your code. So you can use like fep_current_user_can( 'send_new_message_to', UPT()->get_user_id() )

Then you need to add code in php. Check fep_current_user_can( 'send_new_message' ) before that link output.

Do you use any custom code or plugin for login form? Or this form come from theme? Can you give me code of this form so that i can try to give you some integration code if possible?