Crash when equipping the bike armor - pressing OK. Hand in question is in the devastator with 4 free slots available. Attaching log, but I don't see any specific errors there.
EDIT: that's when equipping through the inventory menu. If equipped through armor menu and assigned to craft, hand does not even show up in inventory.
The hand is still on the craft if bike armor is equipped through the armor screen, and their inventory will be available in the pre-mission equip screen. This is a known bug, fixed in the nightly EXE, we're just waiting for that to be merged to OXCE+. The first crash you mention could be missing mod resources, an engine bug, or some discrepancy in the ruleset; I'll look at it.
In the future, a save file with instructions to reproduce the bug is infinitely more useful than the openxcom.log file alone.
Edit: The crashing when equipping the bike armor is related to the bug that was fixed in the nightly - in order to get that inventory screen at the base, a 'fake' battlescape is created and your gals are placed on it. However, it's too small for 2x2 units/armors, so those aren't placed, which is the reason why you don't see the bike's inventory when equipping from the armor screen first. When you try to equip from the inventory screen and press 'OK,' the engine tries to reset the positions of all the gals in the fake battlescape, but crashes because it tries to place the bike on a tile that doesn't exist since it's too big.
Long story short, just equip the bike from the armor screen and wait to fill that gal's inventory until just before battle.