Why won't the virtual machine start on VirtualBox 5.2?

Question

virtual box

Downloaded the latest version of virtualBox = 5.2
I create images from Ubuntu, OpenBSD ect. But always in this version I get errors
like this:

and this:

in the old version 4.3.12, which I tried today - there are no such problems, I created and launched it without problems. For other reasons, I switch to the new version and here it is.
How to debug this matter?

Answer 1

Problems solved:
the first one was solved from the prompt of the window itself,
in my case the service was turned off. Next service / services -> enable. We sort through the launch types and try to launch.
the second of them was solved by the implementation of the first of the recommendations from the official forum https://forums.virtualbox.org/
namely:
1. We are waiting for it -> there were errors -> reboot.
2. Repeat step 1.
3. Profit
After doing it a second time, virtualbox was in the delete list. But suddenly poke on the power button, suddenly everything worked ...