Nullpint

On second thought, disregard my last post. This is why you don't post late at night... Reverting to 2.1.4 (or 2.1.5) fixed the issue because ModuleManager stops working (versions are not compatible with KSP 0.25). I tried 2.5.0 (oldest compatible with KSP 0.25) and still had the issue. My short term fix is to simply disable TweakScale on intake parts by commenting out the entries in the TweakScale Squad configuration file.

I can confirm this bug on OSX too, the log file indicated a null reference exception in TweakScale (sorry I don't have the log, but can be reproduced easily). I've isolated it to ModuleManager (2.1.5). Reverting to 2.1.4 resolves the issue. As there was only a one line change for version 2.1.5 (if (nodes.Length == 0) return null;) I suspect this is what is causing the null reference . I believe this is still a bug which needs to be resolved in TweakScale. You can download the previous ModuleManager at https://github.com/sarbian/ModuleManager/releases