php fatal error when creating the first invoice

Dear creator,

there is a fatal php error when the site is creating the first invoice, this does not happen when the site already has order before. the following error is from apache error log:

PHP Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in ……/woocommerce-pdf-invoices/vendor/mpdf/mpdf/classes/ttfontsuni.php:613

at line 613:
the variable $psName is not an array when the shop has no order before (aka: has no invoice before)

what I did to workaround the issue, I added a “checking if loop” in front of the the for loop to fix the issue:

//i added the following line
if(!empty($psName) && is_array($psName)){
                

for ($i = 0; $i < count($psName); $i++) {
                        $c = $psName[$i];
                        $oc = ord($c);
                        if ($oc > 126 || strpos(' [](){}<>/%', $c) !== false) {
                                //throw new MpdfException("psName=".$psName." contains invalid character ".$c." ie U+".ord(c));
                                $psNameInvalid = true;
                                break;
                        }
                }

//i added the following line
                }

hope the issue can be fixed in the next version

Thank you!