Website not displayed

Dear Xibo Community,

I have a problem to display a Webpage from a video cam.
With the Xibo Client Version R201 it works but after the cam upgrade to a newer version it doesn´t work anymore, I get the following error message in xibo player:

With Internet Explorer, Edge and Google Chrome, it works well.
I tried to install the newer xibo client R255 but then I get the following error message:

Can you help me to find a solution?
Thanks :slight_smile:

I run CMS 2.3.7/Apache