Okay, so when I try to run SSE from MO2, first a load box shows up that says
Promptly followed by
"Mod Organiser is locked while the application is running.
That stays up for no more than 10 seconds before it all disappears, and MO2 reverts to before I clicked "run". Nothing appears in the log box at the bottom of the screen, the screen doesn't flash black when it fails, and Task Manager never shows Skyrim, so I don't believe it booted and crashed.
When booting SKSE it's slightly different, everything in MO2 looks the same, but Task Manager shows that
"a component of the Skyrim SE ..."
Runs, followed by Skyrim itself, but again, after less than 10 seconds, it disappears and MO2 reverts to normal, as if I hadn't tried to run anything. Nothing in the logs.
This doesnt occur when I select my vanilla Skyrim profile, which has no mods enabled, nor does it occur on my Oldrim game instance, which has 5 mods enabled.
I've just seen the new 2.31 update file for MO2, so i'll update to it using the method you suggested
I'm fairly certain my antivirus isn't to blame, as I disabled it while I attempted to boot the game, and the same issues occurred. I have MO2 as whitelisted as I know how to do, my antivirus is unfamiliar to me, so there may be a way to do more than I have, but considering the results of my test, I don't believe it to be the issue, yet
EDIT: Updated from 2.3 to 2.3.1 using the method you suggested, went smoothly, however didn't change the results of booting SSE or SKSE, unfortunately
Edited by Liraeli, 01 August 2020 - 09:01 PM.