Project breaks if Online Subsystem plugin is disabled

Tried to get module interface for unloaded module: 'OnlineSubsystem'[Callstack]  00  0x00007f67dec9b24f  FLinuxPlatformStackWalk::CaptureStackBackTrace(unsigned long long*, unsigned int, void*)
[Callstack]  01  0x00007f67deb7eec5  FGenericPlatformStackWalk::StackWalkAndDump(char*, unsigned long, int, void*)
[Callstack]  02  0x00007f67deca0b54  FDebug::LogAssertFailedMessage(char const*, char const*, int, wchar_t const*, ...)
[Callstack]  03  0x00007f67633e443b  FOnlineSubsystemModule& FModuleManager::GetModuleChecked<FOnlineSubsystemModule>(FName)
[Callstack]  04  0x00007f67633e10ee  FOnlineSubsystemNullModule::StartupModule()
[Callstack]  05  0x00007f67ded6e7a8  FModuleManager::LoadModuleWithFailureReason(FName, EModuleLoadResult&, bool)
[Callstack]  06  0x00007f67d90f354a  FModuleDescriptor::LoadModulesForPhase(ELoadingPhase::Type, TArray<FModuleDescriptor, FDefaultAllocator> const&, TMap<FName, EModuleLoadResult, FDefaultSetAllocator, TDefaultMapKeyFuncs<FName, EModuleLoadResult, false> >&)
[Callstack]  07  0x00007f67d90fba44  FPluginManager::LoadModulesForEnabledPlugins(ELoadingPhase::Type)
[Callstack]  08  0x000000000042b227  FEngineLoop::LoadStartupModules() [/home/doug/Documents/github/4.15.1/Engine/Source/Runtime/Launch/Private/LaunchEngineLoop.cpp, line 2395]
[Callstack]  09  0x000000000041954d  FEngineLoop::PreInit(wchar_t const*) [/home/doug/Documents/github/4.15.1/Engine/Source/Runtime/Launch/Private/LaunchEngineLoop.cpp, line 1832]
[Callstack]  10  0x0000000000424e38  GuardedMain(wchar_t const*) [/home/doug/Documents/github/4.15.1/Engine/Source/Runtime/Launch/Private/Launch.cpp, line 42]
[Callstack]  11  0x00007f67d4da50bc  CommonLinuxMain(int, char**, int (*)(wchar_t const*))
[Callstack]  12  0x00007f67d414a830  /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f67d414a830]
[Callstack]  13  0x0000000000414f39  /home/doug/Documents/github/4.15.1/Engine/Binaries/Linux/UE4Editor(_start+0x29) [0x414f39]

[2017.04.25-14.04.31:413][  0]LogLinux:Error: appError called: Assertion failed: Assertion failed: ModuleManager.IsModuleLoaded(ModuleName) [File:Runtime/Core/Public/Modules/ModuleManager.h] [Line: 258] 
Tried to get module interface for unloaded module: 'OnlineSubsystem'

Signal 11 caught.
Malloc Size=131076 LargeMemoryPoolOffset=131092 
CommonLinuxCrashHandler: Signal=11
Malloc Size=65535 LargeMemoryPoolOffset=196655 
[2017.04.25-14.04.31:483][  0]LogLinux: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to write memory at address 0x0000000000000003

[2017.04.25-14.04.31:483][  0]LogLinux: Assertion failed: Assertion failed: ModuleManager.IsModuleLoaded(ModuleName) [File:Runtime/Core/Public/Modules/ModuleManager.h] [Line: 258] 
Tried to get module interface for unloaded module: 'OnlineSubsystem'


[Callstack]  00  0x00007f67dec9b24f  FLinuxPlatformStackWalk::CaptureStackBackTrace(unsigned long long*, unsigned int, void*)
[Callstack]  01  0x00007f67deb7eec5  FGenericPlatformStackWalk::StackWalkAndDump(char*, unsigned long, int, void*)
[Callstack]  02  0x00007f67dec5ace1  FLinuxCrashContext::CaptureStackTrace()
[Callstack]  03  0x00007f67d4da4220  CommonLinuxCrashHandler(FGenericCrashContext const&)
[Callstack]  04  0x00007f67dec5f625  PlatformCrashHandler(int, siginfo_t*, void*)
[Callstack]  05  0x00007f67e4962390  /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390) [0x7f67e4962390]
[Callstack]  06  0x00007f67deb72d5b  FGenericPlatformMisc::RaiseException(unsigned int)
[Callstack]  07  0x00007f67dec69c28  FOutputDeviceLinuxError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&)
[Callstack]  08  0x00007f67ded3df47  FOutputDevice::Logf(wchar_t const*, ...)
[Callstack]  09  0x00007f67deca095a  FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...)
[Callstack]  10  0x00007f67633e44ac  FOnlineSubsystemModule& FModuleManager::GetModuleChecked<FOnlineSubsystemModule>(FName)
[Callstack]  11  0x00007f67633e10ee  FOnlineSubsystemNullModule::StartupModule()
[Callstack]  12  0x00007f67ded6e7a8  FModuleManager::LoadModuleWithFailureReason(FName, EModuleLoadResult&, bool)
[Callstack]  13  0x00007f67d90f354a  FModuleDescriptor::LoadModulesForPhase(ELoadingPhase::Type, TArray<FModuleDescriptor, FDefaultAllocator> const&, TMap<FName, EModuleLoadResult, FDefaultSetAllocator, TDefaultMapKeyFuncs<FName, EModuleLoadResult, false> >&)
[Callstack]  14  0x00007f67d90fba44  FPluginManager::LoadModulesForEnabledPlugins(ELoadingPhase::Type)
[Callstack]  15  0x000000000042b227  FEngineLoop::LoadStartupModules() [/home/doug/Documents/github/4.15.1/Engine/Source/Runtime/Launch/Private/LaunchEngineLoop.cpp, line 2395]
[Callstack]  16  0x000000000041954d  FEngineLoop::PreInit(wchar_t const*) [/home/doug/Documents/github/4.15.1/Engine/Source/Runtime/Launch/Private/LaunchEngineLoop.cpp, line 1832]
[Callstack]  17  0x0000000000424e38  GuardedMain(wchar_t const*) [/home/doug/Documents/github/4.15.1/Engine/Source/Runtime/Launch/Private/Launch.cpp, line 42]
[Callstack]  18  0x00007f67d4da50bc  CommonLinuxMain(int, char**, int (*)(wchar_t const*))
[Callstack]  19  0x00007f67d414a830  /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f67d414a830]
[Callstack]  20  0x0000000000414f39  /home/doug/Documents/github/4.15.1/Engine/Binaries/Linux/UE4Editor(_start+0x29) [0x414f39]