[Solved] Vbox stopped working, The application can't be opened

[darthpeep]

Prior to a few days ago, VBox was humming along just fine. I started to get some sort of permission error (something or other not owned by root). I tried some of the fixes I found on this board and stackoverflow to no avail, so I proceeded to do a full uninstall and reinstall. I followed the steps that appear on most of these posts (reboot, uninstall, reboot, install, etc). But after several attempts, and just getting "The application VirtualBox can't be opened". It is no longer accompanied by another error popup. If I run VirtualBox from the terminal, I get the following:

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VirtualBox: Error -610 in supR3HardenedMainInitRuntime!
VirtualBox: dlopen("/Applications/VirtualBox.app/Contents/MacOS/VBoxRT.dylib",) failed: <NULL>

VirtualBox: Tip! It may help to reinstall VirtualBox.

I see no relevant console logs (there was an fsck which appears to have complete successfully). The latest install logs are attached. Thanks in advance for any help.
This is virtualbox 5.2.14, High Sierra 10.13.3

[socratis]

The permissions are wrong in your system. What's the output of:

• 
  ls -ald /* ; ls -ald /Applications/*

[darthpeep]

Truncated slightly:

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drwxrwxr-x+ 65 my.name  SECIOUS\Domain Users    2210 Jul  2 16:05 /Applications
drwxr-xr-x+ 65 root              wheel                   2210 Mar 27 14:46 /Library
drwxr-xr-x@  3 root              wheel                    102 Jul  2 15:51 /Network
drwxr-xr-x@  4 root              wheel                    136 Jan 19 00:34 /System

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drwxr-xr-x   3 root  wheel                 102 Jul  2 16:05 /Applications/VirtualBox.app

Although, I did chown /Applications/VirtualBox.app (not recursively because I was tentative) to myself at one point, and it didn't work

[socratis]

drwxrwxr-x+ 65 my.name  SECIOUS\Domain Users    2210 Jul  2 16:05 /Applications

This is definitely wrong. Fix it. And please do NOT truncate anything in the future, or I'm going to truncate my answer, if you know what I mean...

[darthpeep]

NM, I just did root. Still don't know what I did to change it, but that worked. Original problem was probably /Applications changing ownership, and I was focused on /Applications/VirtualBox. Thanks!

[socratis]

problem was probably /Applications changing ownership, and I was focused on /Applications/VirtualBox.

The VirtualBox installer correctly sets the owner:group and its permissions. But it won't take the "liberty" of fixing everything that it checks for. Glad you got it going, marking as [Solved].