KSP crashes when engaging MechJeb autopilot

[roljy]

I'm running KSP 1.8.1 from Steam with a fair number of mods: Realism Overhaul and all its dependencies, Real Solar System and its dependencies, MechJeb2, and Principia. My problem is that I can load my worlds (albeit slowly) and open the launchpad and set a target in map view, but the moment I try engaging the autopilot in MechJeb (or pausing the game—that seems to cause the same problem) the game freezes and I have to force close it.

I'm running it from Steam with the -force-glcore launch option so the game doesn't run out of memory (I have 16gb RAM and my PC's specs should not be a bottleneck).  I've attached my Player.log, KSP.log, and a video with the replication steps here: https://www.dropbox.com/sh/z8024cpf160fjlq/AABq_k5UnXyunaHYc75tk_cKa?dl=0. (Note that the video has like entire minutes of nothing happening; this was actually during the loading screens. Sorry for the choppy video. It didn't look that bad from my end.) I'm trying to launch Raidernick's Luna 13 into Earth orbit at the lunar plane of orbit.

I'm confused because this worked before (about a month ago) without major issues, but trying it now the game pretty much always freezes up. Even funnier is that the one time I record my screen to show it, it actually doesn't freeze the first time around! It did freeze when I disengaged and re-engaged the autpilot though, so the problem really is still there. I know I'm not running out of RAM or anything because when I open the task manager nothing is excessively full (the RAM sits around 70% full when the game is running).

I'd really appreciate it if you guys could give me a hand with getting my game functional again. I know RO works for the people who use it so I'm kinda sad that it doesn't seem to be working for me..

Thanks in advance!