Have a few bugs to report, will have more tomorrow.
I get this one when I try to change paint tone (or select one of the 9 default colors). I'm sure it's come up while doing other things, but I can't remember right now.
This one was definitely game-breaking. It comes up when I do basically anything in the engine editor. Selecting conrod type, adjusting compression, choosing valve cover, anything. You name it, and it throws this up. If I'm trying to change bore for example, it pops up when I click the slider so I basically can't adjust bore.
This last one is another common one. It just recently came up while selecting drive configuration, but will happen when clicking the arrow to go to the next screen (and it sometimes will go to the next screen, but more often than not it will not do anything but freeze the game).
One more bug that doesn't throw a .lua error is that when I try to revise a car (to change the engine, for example) it'll go to the fixture/chassis editor like normal, but when I click the "Engine" tab at the bottom, the game will jump to it for a split-second then it will jump back to the first screen (where you choose frame type and stuff). If I try to close the editor from here, the game will freeze solid. This happens on the last stable release and is not exclusive to the Open Beta, however.
Of course, these could all be happening because of my PC's specs or Windows 10, which wouldn't surprise me.