Since update html2pdf or dompdf not working any more on php 5.6

Hello guys, dose anyone know why or solution. We got a script to generate invoices and was all ok working since 2 weeks ago, i know there was some updates i didnt read and after i just sport it html2pdf and dompdf is not working any more on php 5.6 Dose anyone got any idea ? So i founded a hosting with 84.0.21 the script works perfect but on 86.0.4 no not at all, no erros no nothink.