Rubymine crashes when opening Preferences

1. Open Rubymine. 
2. Open a project
3. Open Preferences 

Result: It crashes. 100% reproducible.

Rubymine 7.1.4, macOS10.12 (16A323)

Stack trace:

Exception Name: NSInternalInconsistencyException
Description: Invalid parameter not satisfying: [self canBecomeMainWindow]
User Info: (null)

0 CoreFoundation 0x00007fffb3ea152b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00007fffc8599cad objc_exception_throw + 48
2 CoreFoundation 0x00007fffb3ea6232 +[NSException raise:format:arguments:] + 98
3 Foundation 0x00007fffb58d9390 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 195
4 AppKit 0x00007fffb1d6a044 -[NSWindow _changeJustMain] + 309
5 Foundation 0x00007fffb5863f2a __NSThreadPerformPerform + 326
6 CoreFoundation 0x00007fffb3e37551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
7 CoreFoundation 0x00007fffb3e186bd __CFRunLoopDoSources0 + 557
8 CoreFoundation 0x00007fffb3e17bb6 __CFRunLoopRun + 934
9 CoreFoundation 0x00007fffb3e175b4 CFRunLoopRunSpecific + 420
10 HIToolbox 0x00007fffb33b8f6c RunCurrentEventLoopInMode + 240
11 HIToolbox 0x00007fffb33b8da1 ReceiveNextEventCommon + 432
12 HIToolbox 0x00007fffb33b8bd6 _BlockUntilNextEventMatchingListInModeWithFilter + 71
13 AppKit 0x00007fffb1aaf5f5 _DPSNextEvent + 1093
14 AppKit 0x00007fffb21bf8eb -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1637
15 libosxapp.dylib 0x000000010c73942a -[NSApplicationAWT nextEventMatchingMask:untilDate:inMode:dequeue:] + 124
16 AppKit 0x00007fffb1aa3fbd -[NSApplication run] + 926
17 libosxapp.dylib 0x000000010c73923e +[NSApplicationAWT runAWTLoopWithApp:] + 156
18 libawt_lwawt.dylib 0x000000010c6c754b -[AWTStarter starter:] + 905
19 Foundation 0x00007fffb5863f2a __NSThreadPerformPerform + 326
20 CoreFoundation 0x00007fffb3e37551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
21 CoreFoundation 0x00007fffb3e186bd __CFRunLoopDoSources0 + 557
22 CoreFoundation 0x00007fffb3e17bb6 __CFRunLoopRun + 934
23 CoreFoundation 0x00007fffb3e175b4 CFRunLoopRunSpecific + 420
24 rubymine 0x00000001000017ba parkRunLoop + 138
25 rubymine 0x000000010000167f main + 175
26 rubymine 0x00000001000015a4 start + 52