The kernel does not initiate correctly

Hi, I have tried many, many times to boot my Raspberry Pi 3 Plus with Ubuntu and I fail. I am uploading a screen shot to illustrate where the problem is (at the very beginning). Could you help me to understand what the error is? Thank you.

I’ve moved this to the category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the Finding Help page.