@sdetweil Thanks for your help.
But it did not solve it…

Could it be that I had no monitor plugged in the HDMI port during install of MM?

I deleted the MM folder. First I saved the modules folder and my config.

then reinstalled MM without installation script, and with monitor plugged in.

But still no luck…

Hi.
I just set up a new installation on my RPi4 with Buster.
MM worked fine before clean install.
I had to do it for other reasons.

So I installed MM with install script.
MM starts after boot with PM2, every module is working.
But I cannot see any images on the “screen”.
With “image” i mean images created in my module with etc.

var img = document.createElement("img");
			img.setAttribute("class", "motionEyeImage");
			img.id = this.config.id;
			img.src = this.config.url;
			img.style.width = this.config.width;
			return img;

First I thought it’s an issue with the module(s) itself.
But it all works fine when I open MM in my Browser
“localhost:8080”

in the “PM2-Session” its only a little icon that indicates, that there should be something…

I created a simple module, just with an img element and an image located in the folder. But the same.