PDFMaker got error500 when upgrade to vtiger8.3

I got error 500 when access to PDFMaker module once upgrade to vtiger8.3
here is error message

Warning: Undefined array key "ITS4YouErrors" in /home2/xxxxx/public_html/vtiger/modules/Settings/ITS4YouInstaller/models/License.php(10) : eval()'d code on line 28
Warning: Trying to access array offset on null in /home2/xxxxx/public_html/vtiger/modules/Settings/ITS4YouInstaller/models/License.php(1

Check the installer and pdf maker version if they are compatible with Vtiger CRM 8.3