Fatal error: ObjectProperty is not being constructed with either NewObject, NewNamedObject or ConstructObject

I’ve been trying to learn automation tests lately, but whenever I call the constructor of a class that I wrote, the editor crashes. These are the critical errors:

[2018.05.12-12.38.57:524][
0]LogWindows: Error: === Critical
error: ===

[2018.05.12-12.38.57:524][
0]LogWindows: Error:

[2018.05.12-12.38.57:524][
0]LogWindows: Error: Fatal error:
[File:D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp]
[Line: 2499]

[2018.05.12-12.38.57:524][
0]LogWindows: Error: ObjectProperty is
not being constructed with either
NewObject, NewNamedObject or
ConstructObject.

[2018.05.12-12.38.57:524][
0]LogWindows: Error:

[2018.05.12-12.38.57:524][
0]LogWindows: Error:

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000FD91A06D
KERNELBASE.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000DBAA7884
UE4Editor-ApplicationCore.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000D4E16D9B
UE4Editor-Core.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000D4D51949
UE4Editor-Core.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000D74E21E4
UE4Editor-CoreUObject.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000CA078CEE
UE4Editor-Engine.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000B9C519F0
UE4Editor-TacticsGame.dll!AGrid::AGrid()
[d:\workspaceunreal\tacticsgame\source\tacticsgame\grid.cpp:6]

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000B9C55C6C
UE4Editor-TacticsGame.dll!FConstructionTest::RunTest()
[d:\workspaceunreal\tacticsgame\source\tacticsgame\test\gridtest.cpp:9]

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000D4D6836A
UE4Editor-Core.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000D4D77496
UE4Editor-Core.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x00000000D4D744F5
UE4Editor-Core.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x000000003FAFFA27
UE4Editor.exe!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x000000003FAF69FA
UE4Editor.exe!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x000000003FAF6C4A
UE4Editor.exe!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x000000003FB04177
UE4Editor.exe!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x000000003FB05B87
UE4Editor.exe!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x0000000077A159CD
kernel32.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x0000000077B4A561
ntdll.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error: [Callstack]
0x0000000077B4A561
ntdll.dll!UnknownFunction

[2018.05.12-12.38.57:524][
0]LogWindows: Error:

[2018.05.12-12.38.57:537][ 0]LogExit:
Executing StaticShutdownAfterError

[2018.05.12-12.38.57:696][
0]LogWindows:
FPlatformMisc::RequestExit(1)

[2018.05.12-12.38.57:770][ 0]Log file
closed, 05/13/18 00:38:57

Grid.cpp

Grid.h

GridTest.cpp