Accessing file for custom error before submission

Hey! I was wondering if there was a way to access the file before it is uploaded so i can make a custom error message by reading the CSV file before the user submits the form?

My wish is to just ensure there is only one email in each row and I am currently unable to get access to the file_path in $csv_team_upload using the forminator_custom_form_submit_errors hook and was wondering if there was a better way to achieve this goal? I have pasted the code the whole code below for reference.

add_filter('forminator_custom_form_submit_errors', function( $submit_errors, $form_id, $field_data_array ) {
	$formatted_data = array();
	$min_additional_users = 2; // does not include the main account which is created separately
	
	foreach ( $field_data_array as $field ) {
		$field_name  = isset( $field['name'] ) ? $field['name'] : '';
		$field_value = isset( $field['value'] ) ? $field['value'] : '';
		$formatted_data[$field_name] = $field_value;
	}

	$csv_team_upload = isset($formatted_data['upload-2']) ? esc_url($formatted_data['upload-2']['file']['file_path']) : null;	

	if($csv_team_upload) {
		$csv_file_contents = file_get_contents($csv_team_upload);
		$csv_array = str_getcsv($csv_file_contents, "\n");
		$emails_array = array();
		$count_valid_emails = 0;

		// loop through each row
		error_log("CSV array: " . print_r($csv_array, true));
		foreach($csv_array as $csv_row){
			error_log("CSV Row: " . print_r($csv_row, true));
			$email_columns = 0; //counts how many email addresses exist in each row
			$csv_columns = str_getcsv($csv_row, ',');

			// loop through each row cell 
			foreach($csv_columns as $column){
				error_log("Column: " . print_r($column, true));
				// detecting cells which contain an email address
				$email = filter_var(trim($column), FILTER_VALIDATE_EMAIL);
				if($email) { // cell contains an email
					$email_columns++; // increment counter
					if($email_columns > 1){ //more than one field has email
						// show selector modal
						 $submit_errors[]['upload-2'] = __( "Your CSV includes $email_columns columns containing email addresses. Please modify your file to include one column of email addresses, then re-upload.");
					} elseif($email_columns < 1) {
						$submit_errors[]['upload-2'] = __( "Your CSV does not include any email addresses. Please modify your file to include one column of email addresses, then re-upload." );
					}
// 					array_push($emails_array,$email);
					$emails_array[$count_valid_emails] = $email;
					$count_valid_emails = $count_valid_emails + 1;
				}
			}
		}
		if($count_valid_emails < $min_additional_users) {
			$submit_errors[]['upload-2'] = __( "Your CSV includes fewer than $min_additional_users Team Members (" . $count_valid_emails . "). You must register at least $min_additional_users additional Team Members to qualify for a Team Subscription." );
			error_log(print_r($emails_array, true));
		}
	}
	error_log("Errors: " . print_r($submit_errors, true));
	
	$submit_errors[]["upload-2"] = __("Fail please.");
	return $submit_errors;
}, 10, 3 );

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